Exchange Online

Refer to the following sections to configure user mappings for Exchange Online to Exchange Online / Gmail migrations.

Exchange Online to Exchange Online

Refer to the following table to view the supported users/groups by user mapping or group mapping:

*Note: In Exchange Online migrations, you can map users across different user types and map groups across different group types.

Source User/Group TypeDestination User/Group TypeMapping ValueExampleComment
Microsoft 365 UserMicrosoft 365 UserGuest User (External User)Mail Userlogin name – login nameuser@contoso1.onmicrosoft.comuser@contoso2.onmicrosoft.comuser@contoso1.onmicrosoft.com represents the email address of a user in your source Exchange Online.user@contoso2.onmicrosoft.com represents the email address of a user in your destination Exchange Online.*Note: If the Exchange Online user has the Send As or Full Access permission to the mailbox you want to migrate, you need to configure another user mapping for the user. Make sure the source mapping value is configured based on the user principal name.
Guest User (External User)Microsoft 365 UserGuest User (External User)Mail Userlogin name – login nameuser@contoso1.onmicrosoft.comuser@contoso2.onmicrosoft.comuser@contoso1.onmicrosoft.com represents the email address of a user in your source Exchange Online.user@contoso2.onmicrosoft.com represents the email address of a user in your destination Exchange Online.*Note: If the Exchange Online user has the Send As or Full Access permission to the mailbox you want to migrate, you need to configure another user mapping for the user. Make sure the source mapping value is configured based on the user principal name.
Mail UserMicrosoft 365 UserGuest User (External User)Mail Userlogin name – login nameuser@contoso1.onmicrosoft.comuser@contoso2.onmicrosoft.comuser@contoso1.onmicrosoft.com represents the email address of a user in your source Exchange Online.user@contoso2.onmicrosoft.com represents the email address of a user in your destination Exchange Online.*Note: If the Exchange Online user has the Send As or Full Access permission to the mailbox you want to migrate, you need to configure another user mapping for the user. Make sure the source mapping value is configured based on the user principal name.
Microsoft 365 GroupMicrosoft 365 GroupDistribution ListMail-enabled Security GroupDynamic Distribution Listemail address – email addressgroup@contoso1.onmicrosoft.comgroup@contoso2.onmicrosoft.comgroup@contoso1.onmicrosoft.com represents the email address of the group/list in your source Exchange Online, while group@contoso2.onmicrosoft.com represents the email address of your group/list in the destination Exchange Online.
Distribution ListMicrosoft 365 GroupDistribution ListMail-enabled Security GroupDynamic Distribution Listemail address – email addressgroup@contoso1.onmicrosoft.comgroup@contoso2.onmicrosoft.comgroup@contoso1.onmicrosoft.com represents the email address of the group/list in your source Exchange Online, while group@contoso2.onmicrosoft.com represents the email address of your group/list in the destination Exchange Online.
Mail-enabled Security GroupMicrosoft 365 GroupDistribution ListMail-enabled Security GroupDynamic Distribution Listemail address – email addressgroup@contoso1.onmicrosoft.comgroup@contoso2.onmicrosoft.comgroup@contoso1.onmicrosoft.com represents the email address of the group/list in your source Exchange Online, while group@contoso2.onmicrosoft.com represents the email address of your group/list in the destination Exchange Online.
Dynamic Distribution ListMicrosoft 365 GroupDistribution ListMail-enabled Security GroupDynamic Distribution Listemail address – email addressgroup@contoso1.onmicrosoft.comgroup@contoso2.onmicrosoft.comgroup@contoso1.onmicrosoft.com represents the email address of the group/list in your source Exchange Online, while group@contoso2.onmicrosoft.com represents the email address of your group/list in the destination Exchange Online.

Exchange Online to Gmail

Refer to the following table to view the supported users/groups:

Source UserDestination UserMapping ValueExampleComment
Microsoft 365 UserGuest User (External User)Mail UserMicrosoft 365 GroupMail-enabled Security GroupDistribution List GroupDynamic Distribution ListGoogle UserGoogle Grouplogin name / email address – login name / email addressuser@contoso.onmicrosoft.comuser@contosogsuite.comgroup@contoso.onmicrosoft.comgroup@contosogsuite.comgroup@contoso.onmicrosoft.comuser@contosogsuite.comuser@contoso.onmicrosoft.comgroup@contosogsuite.comuser@contoso1.onmicrosoft.com represents the email address of a user in your source Exchange Online.user@contosogsuite.com represents the email address of a user in your destination Gmail.group@contoso.onmicrosoft.com represents the email address of a group in your source Exchange Online.group@contosogsuite.com represents the email address of a google group in your destination Gmail.