Microsoft 365 Alert – Service Degradation – Microsoft Teams – Users may be unable to open some SharePoint Online list links through Microsoft Teams on iOS and receive an error – RESOLVED

14/01/2026 08:56:00 AM

NHSmail Reference: INC46723563

Microsoft Reference: TM1217690

Issue Status: RESOLVED

Issue Description: Users may be unable to open some SharePoint Online list links through Microsoft Teams on iOS and receive an error

More info: Specifically, users attempting to access SharePoint lists through Teams on iOS may receive an access permissions error stating: “Permission required – You do not have permission to open this file.”

While they are focused on remediation, users on iOS can access the affected pages and list links by manually copying the impacted URLs from the Teams chat to open them elsewhere. Additionally, users with access to alternative Microsoft Teams access methods such as the Microsoft Teams desktop client and web app can use these to avoid impact.

Final Update: 27/02/2026 08:29:00 AM – Microsoft has update containing the fix has completed deploying to the entirety of the affected infrastructure and they have confirmed through internal testing that the issue is resolved.

Scope of impact: Any users attempting to access SharePoint lists through links shared on Microsoft Teams while on iOS may be impacted. This information may be updated as their investigation continues.

Root cause: A latent code issue is affecting the request flow leveraged for SharePoint Online list link access within Microsoft Teams on iOS, resulting in impact.

Next steps: Microsoft are investigating further into the latent code issue to better understand how it was introduced and why it wasn’t caught prior sooner so that we can prevent impact to SharePoint Online list links through Microsoft Teams on iOS in the future.