MapiExceptionTooComplex

As I am working toward decommissioning Exchange 2010, someone who has a mailbox in Exchange Online (EXO) was having an issue with staying connected to an on premises shared mailbox using Outlook. I proposed moving it to EXO to address the issue. While onboarding the mailbox to EXO, the move gave me an error that…

AD Attributes Changed When an On-Premises User Mailbox is Moved to EXO

The following is a list of attributes I tracked that change for an AD user when their associated mailbox is moved (via hybrid) to Exchange Online… homeMDB legacyExchangeDN mDBUseDefaults mS-DS-ConsistencyGuid msDS-ExternalDirectoryObjectId msExchCalendarLoggingQuota msExchELCMailboxFlags msExchHomeServerName msExchMailboxSecurityDescriptor msExchRBACPolicyLink msExchRecipientDisplayType msExchRecipientTypeDetails msExchRemoteRecipientType msExchUserCulture proxyAddresses targetAddress uSNChanged Reference(s)… https://blogs.technet.microsoft.com/dkegg/2014/08/27/ad-attributes-that-are-changed-when-a-mailbox-moves-to-office-365/ https://docs.microsoft.com/en-us/azure/active-directory/connect/active-directory-aadconnectsync-attributes-synchronized Report Comment

Add Mailbox Users to Distribution Lists with PowerShell

To add an individual mailbox user to a distribution group in PowerShell that has an owner already assigned, the command will look similar to this… Add-DistributionGroupMember -Identity “DISTRIBUTION_GROUP_NAME” -Member “USER_ALIAS” -BypassSecurityGroupManagerCheck   To add multiple mailbox users to multiple distribution groups, we need to make a CSV file (C:\DistroMembers.csv for this example). The CSV file should…