[done] UPN transition for employees/students, March 12, 2026, 8 a.m. to 12 p.m.

On March 12, 2026, your User Principal Name (UPN) was successfully updated to your primary email address (usually vorname.nachname@tu-dresden.de).

You will use this address to log in to your mailbox and SharePoint in your email program. With this change, we are adapting the login name to common Microsoft standards and improving findability in SharePoint Online and Teams – including for external partners.

As a rule, you can continue working without restrictions. In individual cases, the following effects may occur:

• Outlook prompts you to log in again: Please use your primary email address and password to log in. If the login name cannot be edited, select “Log in with another user account.”
• Outlook signature is missing: Open a sent email, select and copy the signature, then paste it under ‘New Email’ -> ‘Signature’ -> ‘Signatures’ -> ‘New’, and specify at the bottom when it should be used. Confirm by clicking ‘OK’.
• Thunderbird requests re-login: If the password entry is unsuccessful, cancel the process. In the account settings, change the username to your primary email address in the server settings.
• Mobile email clients: Please check whether email retrieval continues to work correctly after the changeover. If necessary, change the username in the settings to the primary email address of the functional login.
• SharePoint requests access data: Please log in again using your primary email address as your username.
  Attention (employees only):
  Sharepoint der TUD: https://sharepoint.tu-dresden.de/
  Sharepoint M365: https://tudresdende-my.sharepoint.com/
• OneDrive synchronization is interrupted: Please restart your computer or log out of OneDrive and log back in. Attention (employees only): OneDrive der TUD: https://mysites.tu-dresden.de OneDrive M365: https://tudresdende-my.sharepoint.com

Notes:

• SharePoint mySites automatically adjust the links.
• Service owners at ZIH and members of the Digitalization Support Center (SCD) have already been migrated and are not affected again here.

If you have any further questions, please contact the Service Desk.