Friday, November 1, 2019

Patching old Exchange 2013 or Exchange 2016 servers

When patching Exchange 2013 or Exchange 2016 from an old Cumulative Update version, it is common to need to hop through multiple versions of Exchange Server.

For example, if your on Exchange CU11... to remain in a supported state you will need to patch as follows:
  • Upgrade Exchange 2013 from CU11 to CU15.
  • Upgrade the .NET Framework to 4.6.2
  • Upgrade from Exchange 2013 CU15 à CU20
  • Upgrade .NET Framework to 4.7.1
  • Upgrade from Exchange 2013 CU20 à CU22
  • Upgrade .NET Framework to 4.7.2
  • Upgrade from Exchange 2013 CU22 à CU23
See the support matrix here:

The problem that most people on old patch levels find, is Microsoft has removed many of the older CU updates which makes moving from an old patch level a difficult task.

Luckily we have a legend that has posted all the Exchange updates here:

Very handy link to keep in your favorites.

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