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Exchange Team Blog
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Released: March 2021 Exchange Server Security Updates

The_Exchange_Team's avatar
The_Exchange_Team
Platinum Contributor
Mar 02, 2021
Note: this post is getting frequent updates; please keep checking back. Last update: 3/19/2021 Microsoft has released a set of out of band security updates for vulnerabilities for the following ver...
Updated Mar 19, 2021
Version 44.0
announcements
Exchange 2010
Exchange 2013
exchange 2016
exchange 2019
on premises
security
EddieRowe's avatar
EddieRowe
Brass Contributor
Mar 03, 2021

We installed the RU32 for Exchange 2010 SP3 (previously RU30) running on Server 2008 R2 x64 and we are not able to open mailboxes on the the Exchange server via OWA afterwards.  We are working on getting to Exchange Online...have multiple tickets open for multiple issues with hybrid mode since we want to get off this unsupported OS and app.

  1. Open elevated command prompt.
  2. Install RU32.
  3. Reboot.
  4. Open mailbox with Outlook = no issues.  Logon OWA successfully, but unable to see any mailbox contents.  Error message "The mailbox you're trying to access isn't currently available. If the problem continues, contact your helpdesk."
  5. Uninstall RU32.
  6. Reboot.
  7. Open mailbox with Outlook = no issues.  Logon OWA successfully & no issues.