Canada Time Zone Changes Break Microsoft 365 Logins, but There's a Temporary Fix

Microsoft 365 users in Canada are reporting authentication failures after switching their Windows PCs to Alberta’s updated time zone. The issue prevents users from signing in to several Microsoft applications, including Teams, Outlook, Edge, Word, and OneDrive.

According to reports on Reddit, affected users encounter a generic “Something went wrong, please try again” message without a useful error code. The problem follows Microsoft’s recent time zone changes in Canada, which have also caused problems with Outlook, Teams, and Exchange Online.

Alberta’s new time zone causes Microsoft 365 authentication failures

IT administrators began noticing the problem after applying Alberta’s updated time zone settings to Windows devices.

Initially, some suspected corrupted authentication tokens or a faulty Windows update. However, uninstalling updates and clearing authentication-related data reportedly failed to restore access.

The reports suggest a connection between the new time zone configuration and Microsoft 365’s authentication process, although Microsoft has not confirmed the underlying cause.

Administrators find a temporary workaround

Affected administrators discovered that switching Windows to Saskatchewan’s time zone, which uses UTC-06:00, and restarting the computer can restore Microsoft 365 authentication.

Administrators can apply the workaround through PowerShell using the following command:

Set-TimeZone -Id "Canada Central Standard Time"

After running the command, users must restart their PCs for the change to take effect.

Some users in British Columbia also reported success after switching to a different time zone, restarting their devices, and then switching back to their original time zone.

However, these solutions come from community reports rather than Microsoft. Changing time zones can also affect how Windows and Microsoft 365 applications display times, potentially creating scheduling issues.

Microsoft has yet to acknowledge the login problem

Microsoft has already published official guidance on Alberta’s 2026 time zone update, identifying several Microsoft services that could experience problems following Canada’s time zone changes.

However, the company has not specifically acknowledged the reported Microsoft 365 authentication failures or provided a dedicated fix.

For now, affected organizations may need to use the community-discovered workarounds while monitoring Microsoft’s guidance for further updates.

In other Outlook news, Microsoft is making Outlook Search smarter with a new AI model and bringing a unified inbox to the new Outlook.

Via Neowin