ISSUE When attempting to email any mailbox which is hosted in O365 where a hybrid (co-existence) configuration has been deployed with an on-premise Exchange 2003 organisation you receive NDR email messages and event log errors
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Unable to Relay email between Coexsistance (Hybrid) Exchange Organisations O365
If you find you are having issues with email delivery between O365 (Exchange Online) and On-premises it is possible that the domain is set to outboundonly true Hopefully the following will resolve your issue $Cred
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Archive Option Missing from O365 Migrated user
You may notice after you have migrated an Exchange 20032007 On-Premise user to O365 Exchange Online that the Archive Feature is not avalible. to enable the feature please run though the following steps To
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