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

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