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Microsoft classic Outlook for Windows OMEv2 encrypted email opening failure

Service Disruption
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1 unique sources, 1 articles

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Microsoft is dealing with a known issue in classic Outlook for Windows that stops users from opening OMEv2 encrypted emails from another tenant, creating access failures for secure mail. The problem affects users in all Office channels and can surface as an Information Rights Management configuration error. Microsoft has not confirmed the cause yet, but it has shared a temporary workaround for impacted customers.

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Timeline

  1. 26.09.2025 19:43 1 articles · 8mo ago

    Microsoft investigates classic Outlook OMEv2 email opening error

    Initial Disclosure

    Microsoft is investigating a known issue in classic Outlook for Windows across all Office channels that prevents users from opening OMEv2 encrypted emails sent from another tenant and can display the error message "Configuring your computer for Information Rights Management".

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  2. 26.09.2025 19:43 2 articles · 8mo ago

    Microsoft shares workaround for encrypted Outlook email errors

    Mitigation Patch Update

    Microsoft shared a temporary workaround for impacted customers that requires either excluding external users from Conditional Access requirements or enabling cross-tenant access to trust multifactor authentication claims from other organizations; the guidance notes that both the sending and receiving organizations may need to apply the same change for encrypted email to open without an error.

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