Symptom:

Event ID 2937 is logged on the legacy server after migrating public folder from legacy exchange server to Exchange 2013 server

Log Name:  Application

Source:  MSExchange ADAccess

Date:  2/5/2017 10:01:59 PM

Event ID:  2937

Task Category: Validation

Level: Warning

Keywords:  Classic

User:  N/A

Computer:  EXserver.contoso.com

Description:

Process powershell.exe (EMS) (PID=9440). Object [CN=DB02,CN=Databases,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=CONTOSO,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=CONTOSO,DC=com]. Property [PublicFolderDatabase] is set to value [CONTOSO.COM/Configuration/Deleted Objects/pf13db

DEL:3ae54c04-00b0-4b1c-8253-be857775500a], it is pointing to the Deleted Objects container in Active Directory. This property should be fixed as soon as possible.

Cause:

Mailbox database property is pointing to the deleted public folder database.

Resolution:

Delete the entry from ADSI

Configuration->CN=Configuration,DC=contoso,DC=com->CN=Services->CN=Microsoft Exchange->CN=test->CN=Administrative Groups->Exchange Administrative Group (FYDIBOHF23SPDLT)->CN=Databases:

Right-click the affected mailbox database “MBX1”, choose Properties.

Find the msExchHomePublicMDB, double-click it.

Click Clear to clear the value which points to a deleted object currently. Click OK to apply the change.

Repeat step 2-4 for all mailbox databases under Databases container

More Information: 

https://www.vcloudnine.de/exchange-2013-event-id-2937-msexchange-adaccess-after-public-folder-migration/