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Exchange Online Public Folder

Refer to the following table to view the supported user/group mappings:

Source User/Group Type	Destination User/Group Type	Mapping Value	Example	Comment
Microsoft 365 User	Microsoft 365 User Guest User (External User) Mail User	login name – login name	`user@contoso1.onmicrosoft.com` – `user@contoso2.onmicrosoft.com`	`user@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 User Guest User (External User) Mail User	login name – login name	`user@contoso1.onmicrosoft.com` – `user@contoso2.onmicrosoft.com`	`user@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 User	Microsoft 365 User Guest User (External User) Mail User	login name – login name	`user@contoso1.onmicrosoft.com` – `user@contoso2.onmicrosoft.com`	`user@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 Group	Microsoft 365 Group Distribution List Mail-enabled Security Group Dynamic Distribution List	email address – email address	`group@contoso1.onmicrosoft.com` – `group@contoso2.onmicrosoft.com`	`group@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 List	Microsoft 365 Group Distribution List Mail-enabled Security Group Dynamic Distribution List	email address – email address	`group@contoso1.onmicrosoft.com` – `group@contoso2.onmicrosoft.com`	`group@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 Group	Microsoft 365 Group Distribution List Mail-enabled Security Group Dynamic Distribution List	email address – email address	`group@contoso1.onmicrosoft.com` – `group@contoso2.onmicrosoft.com`	`group@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 List	Microsoft 365 Group Distribution List Mail-enabled Security Group Dynamic Distribution List	email address – email address	`group@contoso1.onmicrosoft.com` – `group@contoso2.onmicrosoft.com`	`group@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.