Released: July 2021 Exchange Server Security Updates

additional information added at our post of problems with Schema-update:

In the Exchangesetuplog we see also this message:

[07-22-2021 07:55:28.0679] [1] Evaluated [Setting:MicrosoftExchangeSystemObjectsCN] [HasException:True] [Value:
System.DirectoryServices.DirectoryServicesCOMException (0x8007202B): A referral was returned from the server.

at System.DirectoryServices.DirectoryEntry.Bind(Boolean throwIfFail)
at System.DirectoryServices.DirectoryEntry.Bind()
at System.DirectoryServices.DirectoryEntry.get_AdsObject()
at System.DirectoryServices.DirectorySearcher.FindAll(Boolean findMoreThanOne)
at Microsoft.Exchange.Management.Deployment.ADProvider.Run(Boolean useGC, String directoryEntry, String[] listOfPropertiesToCollect, String filter, SearchScope searchScope)
at Microsoft.Exchange.Management.Analysis.PrereqAnalysis.<CreateActiveDirectoryPrereqProperties>b__120(Result`1 x)
at Microsoft.Exchange.Management.Analysis.Builders.SettingBuilder`2.<>c__DisplayClass1.<SetValue>b__0(Result x)
] [ParentValue:"<NULL>"] [Thread:41] [Duration:00:00:46.3759730]
[07-22-2021 07:55:28.0679] [1] Finished [Setting:MicrosoftExchangeSystemObjectsCN] [Duration:00:00:46.3759730]

and this one:

[07-22-2021 07:54:43.0115] [1] Evaluated [Setting:IsHybridObjectFoundOnPremises] [HasException:True] [Value:
Microsoft.Exchange.Management.Deployment.HybridConfigurationDetection.HybridConfigurationDetectionException: The On-Premises test failed with the message: Object reference not set to an instance of an object.. ---> System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.Exchange.Management.Deployment.HybridConfigurationDetection.HybridConfigurationDetection.TestOnPremisesOrgRelationshipDomainsCrossWithAcceptedDomain(IOnPremisesHybridDetectionCmdlets onPremCmdlets)
at Microsoft.Exchange.Management.Deployment.HybridConfigurationDetection.HybridConfigurationDetection.RunOnPremisesHybridTest()
--- End of inner exception stack trace ---
at Microsoft.Exchange.Management.Deployment.HybridConfigurationDetection.HybridConfigurationDetection.RunOnPremisesHybridTest()
at Microsoft.Exchange.Management.Analysis.PrereqAnalysis.<.ctor>b__27(Result`1 x)
at Microsoft.Exchange.Management.Analysis.Builders.SettingBuilder`2.<>c__DisplayClass1.<SetValue>b__0(Result x)
System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.Exchange.Management.Deployment.HybridConfigurationDetection.HybridConfigurationDetection.TestOnPremisesOrgRelationshipDomainsCrossWithAcceptedDomain(IOnPremisesHybridDetectionCmdlets onPremCmdlets)
at Microsoft.Exchange.Management.Deployment.HybridConfigurationDetection.HybridConfigurationDetection.RunOnPremisesHybridTest()
] [ParentValue:"<NULL>"] [Thread:44] [Duration:00:00:00.8437672]
[07-22-2021 07:54:43.0115] [1] Finished [Setting:IsHybridObjectFoundOnPremises] [Duration:00:00:00.8437672]