Issue
The Archive Shuttle Stage 2 Office365DeleteShortcuts command may fail with the following error:
2016-01-22 21:11:37Z|9532| 39| INFO| ProcessSearch|Processing command [Office365DeleteShortcuts], archive mailbox [test.user@abc.com] 2016-01-22 21:11:39Z|9532| 11|ERROR| HandleRemoteException|[test.user@abc.com]: Error during call to Exchange Service - ServiceResponse details: [Too many concurrent connections opened., Microsoft.Exchange.Data.Storage.TooManyObjectsOpenedException: Cannot open mailbox /o=ExchangeLabs/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=8fcc0185373f414dbb1245c0f0844625-test user. ---> Microsoft.Mapi.MapiExceptionSessionLimit: MapiExceptionSessionLimit: Unable to open message store. (hr=0x80040112, ec=1246)
Solution
Decrease the Shortcut Process Item Parallelism and Shortcut deletion maximum batch count. It may be set too high for the environment.
The following steps explain how to change this value:
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