To ensure that an Exchange Online user can access the on-premises Exchange Control Panel (ECP), you need to configure certain Active Directory attributes correctly. Here are the key attributes and steps to point the user to the right on-premises Exchange server:
Key Attributes to Configure:
- msExchHomeServerName: This attribute specifies the Exchange server that hosts the user’s mailbox.
- msExchRecipientTypeDetails: Indicates the type of recipient. For a remote user mailbox, this should be set to
2147483648
. - msExchRemoteRecipientType: Indicates the type of remote recipient. For a migrated mailbox, this should be set to
4
.
Steps to Update Attributes:
Open Active Directory Users and Computers (ADUC):
- Enable Advanced Features from the View menu to access the Attribute Editor tab.
Locate the User:
- Find the user account that needs access to the on-premises ECP.
Update Attributes:
- msExchHomeServerName: Set this attribute to the FQDN of the on-premises Exchange server.
- msExchRecipientTypeDetails: Set this attribute to
2147483648
- msExchRemoteRecipientType: Set this attribute to
4
Example PowerShell Command:
You can use PowerShell to update these attributes:
# Replace 'username' with the actual username and 'exchangeServerFQDN' with the FQDN of your on-premises Exchange server
Set-ADUser -Identity username -Add @{
msExchHomeServerName="exchangeServerFQDN";
msExchRecipientTypeDetails=2147483648;
msExchRemoteRecipientType=4
}
Additional Considerations:
- Autodiscover Configuration: Ensure that the Autodiscover service is correctly configured to point to your on-premises Exchange server.
- Hybrid Configuration: Verify that your hybrid configuration is set up correctly to allow seamless access between Exchange Online and on-premises environments
These steps should help you point the Exchange Online user to the correct on-premises Exchange server for accessing the ECP. If you need further assistance or have any other questions, feel free to drop me a comment!