Data centre migration

Information Hub:
Signing in to e-Invoicing and Supplier Management is changing

If you currently sign in through tradex.causeway.com, you'll soon begin signing in through CausewayOne at one.causeway.com. 

You'll find everything you need to prepare for the move to CausewayOne here, including key dates, sign-in guidance and FAQs. We'll continue updating this page with the latest information throughout the rollout.

Last updated 14th July 2026.

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Here's everything you need to know: 


Key information

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When is the change taking place?

We'll be back in touch soon to confirm the new transition date.

Until then, anyone currently signing in through tradex.causeway.com should continue to do so as normal.




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What's changing?

The way you access e-Invoicing and Supplier Management is changing.

When the transition takes place, you'll sign in through CausewayOne at one.causeway.com instead of tradex.causeway.com. The services you use will remain the same.

Once the transition is complete, tradex.causeway.com will no longer be available for sign-in.

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Who is affected?

This change affects anyone who currently signs in through tradex.causeway.com to access Causeway's e-Invoicing or Supplier Management services.

If you're already using CausewayOne as a Buyer or Supplier, you don't need to take any action. We'll communicate directly with everyone affected by this change and provide everything they need before the transition begins.

 

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What do I need to do? 

You don't need to take any action just yet.

We'll confirm the new transition date soon. Once the transition begins, visit one.causeway.com, enter the email address you currently use to access the service and follow the on-screen instructions to set up your CausewayOne account.

Once your account has been created, you'll be able to continue accessing your e-Invoicing or Supplier Management services through CausewayOne.

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What is happening?

We're extending CausewayOne to e-Invoicing and Supplier Management portal users, bringing buyers, suppliers and portal users together within a single connected experience.

By bringing everyone onto the same platform, we're simplifying the way users access our services today while creating a more connected experience that supports future improvements across our e-Invoicing and Supplier Management solutions.

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Why is this happening? 

We're extending CausewayOne to portal users, bringing buyers, suppliers and portal users together within a single connected experience.

This helps us simplify access today while supporting future improvements across our e-Invoicing and Supplier Management solutions.

See upgrade schedule
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What is changing

From 21st July, portal users will sign in to Causeway's e-Invoicing and Supplier Management solutions through CausewayOne at one.causeway.com.

Portal users will no longer be able to sign in through tradex.causeway.com.

The way users sign in is changing, but existing functionality, integrations, data and business processes will continue as normal. 

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What does this mean for you?

If you're a Causeway customer, no action is required. Causeway will manage the transition in full, including communications, guidance and support for affected portal users.

If you're a portal user, we'll contact you directly before the transition with everything you need to sign in through CausewayOne.

We'll also provide supporting resources should you wish to communicate the change within your organisation or wider supply chain.

Why are we making this change?

We're extending CausewayOne to people who currently sign in through tradex.causeway.com, bringing buyers, suppliers and users together within a single connected experience.

When the transition takes place, you'll sign in through CausewayOne at one.causeway.com instead of tradex.causeway.com. While the way you sign in is changing, the services you use will remain the same.

Moving to CausewayOne provides a more consistent sign-in experience across Causeway services while creating a modern platform that supports enhanced security and future improvements.

 

 

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What happens when the transition begins?

If you currently sign in through tradex.causeway.com, you'll soon begin signing in through CausewayOne.

We've made getting started as straightforward as possible. When it's time to move, simply follow the step-by-step guidance below to set up your CausewayOne account and continue accessing your e-Invoicing or Supplier Management services.

CausewayOne login page
1
Visit one.causeway.com

When the transition begins, visit one.causeway.com to begin signing in through CausewayOne. Please wait for us to confirm the transition date with you before trying to create your CausewayOne account, as the new sign-in process won't be available beforehand. 

2
Create and verify your account

Enter the email address you currently use to access the portal. We'll send a verification email to this address. Open the email and select the verification link, then follow the on-screen instructions to complete your account setup, including creating a new password for your CausewayOne account.

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Sign in and access your services

Once your account has been created and your email address verified, sign in through CausewayOne to access your e-Invoicing and Supplier Management services. Everything else stays the same, so you can continue submitting invoices, completing PQQs and managing supplier information as you do today.

Additional information

The information below is tailored to your role, with guidance, resources and support to help you prepare for the move to CausewayOne. 

If you're already using CausewayOne as a Buyer or Supplier
  • No action is required. Your existing integrations and business processes will continue as normal.
  • We'll communicate directly with anyone in your supply chain who currently signs in through tradex.causeway.com, guiding them through the move to CausewayOne.
  • We'll continue to update this Information Hub with the latest guidance, communications and supporting resources to help you keep your organisation and wider supply chain informed throughout the transition. 
If you currently sign in through tradex.causeway.com

  • There's nothing you need to do just yet. We'll be in touch to let you know when it's time to move and provide everything you need to get started.

  • In the meantime, follow the guidance on this page to familiarise yourself with what's changing and what to expect when the transition begins.

  • Need help? You'll find the latest FAQs, guidance and support resources throughout this Information Hub

Frequently Asked Questions
What is changing?

You'll soon begin signing in through CausewayOne at one.causeway.com instead of tradex.causeway.com.

The way you sign in is changing, but the services you use are not.

What do I need to do?

There's nothing you need to do just yet.

We'll be in touch to confirm when the transition is taking place. Once the transition begins, visit one.causeway.com, enter the email address you currently use to sign in and follow the on-screen instructions to set up your CausewayOne account.

Once your account has been created, you'll be able to sign in and continue accessing your services.

Can I still use tradex.causeway.com?

For now, yes.

Once the transition has taken place, tradex.causeway.com will no longer be available for sign-in.

You'll then need to sign in through one.causeway.com instead.

Will I still be able to access the same services?

Yes. The way you sign in is changing, but existing functionality, integrations, data and business processes will continue as normal.

If you're an e-Invoicing user, you'll continue to access services such as invoice submission and PO Flip.

If you're a Supplier Management user, you'll continue to access services such as PQQ submissions and supplier information management.

Will my data be affected?

No.

All of your existing data will remain available once you've signed in through CausewayOne.

Will my username or email address change?

No.

Please use the same email address you currently use to access tradex.causeway.com when setting up your CausewayOne account.

Can I enable Single Sign-on (SSO) or Multi-factor Authentication (MFA) for my CausewayOne account?

One of the benefits of moving to CausewayOne is that you'll soon be able to enable Single Sign-on (SSO) and Multi-factor Authentication (MFA) for your account. We'll let you know when these features are available and provide step-by-step guidance on how to activate them.

For the initial transition, continue signing in using the email address you currently use to access e-Invoicing or Supplier Management. 

Can I continue using a shared email address?

Yes. If you currently use a shared email address to access e-Invoicing or Supplier Management, you can continue to do so after moving to CausewayOne.

To create your CausewayOne account, you'll need access to the shared mailbox so you can complete the email verification step.

As we introduce additional sign-in options, such as Single Sign-on (SSO) and Multi-factor Authentication (MFA), you may wish to review how shared email addresses are used. We'll provide further guidance ahead of these features becoming available, so there's nothing you need to do now.

What if I can't sign in?

Before requesting support, please make sure the transition has begun. The new sign-in process won't be available until we confirm the new transition date. 

If you're still unable to sign in or experience any issues accessing your CausewayOne account, please follow your usual support process and contact the organisation you submit invoices, complete PQQs or manage supplier information for. They'll be able to raise a Support Ticket with Causeway on your behalf if further assistance is required.

Where can I get help?

You'll find the latest guidance, FAQs and support resources throughout this Information Hub.

If you still need help, please continue to follow your usual support process by contacting the organisation you use e-Invoicing or Supplier Management with. They'll be able to raise a Support Ticket with Causeway on your behalf if further assistance is required.

I'm a Buyer, will Causeway communicate these changes to my supply chain that are still logging in through the portal?

Yes. We'll communicate directly with all affected portal users directly and guide them through the transition before it takes place.

Can I communicate this change to my organisation or supply chain?

Yes. We'll continue to provide guidance and supporting resources throughout the transition to help you communicate the upcoming changes within your organisation and across your wider supply chain.

You can also share this Information Hub to help keep colleagues and your supply chain informed.

Where can I get support?

If you have any questions, please contact your Account Manager or raise a case through our Support Portal.

Do I need to do anything?

No. Causeway will manage the transition in full, including all communications, guidance and support for everyone affected by this change.

If there are colleagues within your organisation who work with your suppliers or support your e-Invoicing and Supplier Management processes, we recommend making them aware of the upcoming transition.

You can also share this Information Hub with relevant colleagues or your wider supply chain to help keep everyone informed.

What is changing?

People signing in through tradex.causeway.com will begin signing in through CausewayOne at one.causeway.com instead.

The way they sign in is changing, but existing functionality, integrations, data and business processes will continue as normal.

The way portal users sign in is changing, but existing functionality, integrations, data and business processes will continue as normal.

Will this affect the way I use e-Invoicing or Supplier Management?

No. This change only affects people who currently sign in through tradex.causeway.com to access Causeway's e-Invoicing and Supplier Management services.

Your existing processes, integrations, data and business processes will continue as normal.

What should I do if someone in my supply chain contacts me with questions?

Causeway will communicate directly with everyone affected by this transition and provide guidance throughout the programme.

If someone in your organisation or wider supply chain contacts you with questions, please direct them to this Information Hub, where they'll find the latest guidance, FAQs and support information.

If they need further assistance, you can continue to raise a Support Ticket on their behalf through the  Support Portal, just as you do today.

Will my suppliers be able to use Single Sign-on (SSO) or Multi-factor Authentication (MFA) once they've moved to CausewayOne?

One of the benefits of bringing your suppliers onto CausewayOne is that they'll soon be able to enable Single Sign-on (SSO) and Multi-factor Authentication (MFA), giving them greater flexibility and additional security when signing in. These features will be introduced shortly after the initial migration, and we'll communicate directly with users when they're available and explain how to activate them.

Can our suppliers continue using shared email addresses?

Yes.

People who currently access e-Invoicing or Supplier Management using a shared email address can continue to do so after moving to CausewayOne.

They'll simply need access to the shared mailbox to complete the email verification step when creating their CausewayOne account.

As we introduce additional sign-in options, such as Single Sign-On (SSO) and Multi-Factor Authentication (MFA), organisations may wish to review how shared email addresses are used. We'll provide further guidance before these features become available, so no action is required at this stage.

I'm already using CausewayOne. Does this change affect me? 

No. Buyers and some suppliers already access e-Invoicing and Supplier Management through CausewayOne, so you don't need to take any action.

This change only affects people who currently sign in through tradex.causeway.com.

If anyone in your organisation or supply chain currently signs in through tradex.causeway.com, we'll communicate directly with them and provide everything they need before the transition begins.

Where can I get support?

 We'll continue updating this Information Hub throughout the transition with the latest guidance, FAQs and support information. 

If you need additional help, please reach out to our Support team using the Support Portal.

Which products are affected?

 

Enquiries / eTender
CMF
CLM
CausewayOne Enquiries
Tradex (FTP / SMTP)
CPA
CFA
BPM
Vision
Mobile Workforce
Scheduling
CPI
Causeway Estimating