exchange 2016 anonymous calendar sharing problem after KB5036386

Sciebura Michał 0 Reputation points

After installing KB5036386 calendar sharing to external anonymous users is not possible.

Users get: This calendar is not available

Exchange Server
Exchange Server
A family of Microsoft client/server messaging and collaboration software.
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  1. JimmyYang-MSFT 48,706 Reputation points Microsoft Vendor

    @Sciebura Michał

    Based on my research, you may meet these known issues after you install KB5036386, you could check it:

    KB5036386 is a security update for Microsoft Exchange Server. It is possible that this update has caused some changes to the calendar sharing settings. In this way, you could check:

    1. Check the calendar sharing settings in Exchange Server and make sure that external anonymous users are allowed to access the calendar.
    2. Check if the issue is specific to a particular user or calendar. If yes, try to recreate the calendar or user account.

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