Exchange Online policies are loaded into One Identity Manager by synchronization and cannot be edited in One Identity Manager. You can assign policies toExchange Online mailboxes.
Sharing administration policies
Sharing policies are implemented to make calendar and contact data available to external users. Assigning a sharing policy to a mailbox regulates how calendar and contact data can be shared with user accounts outside the Exchange Online organization.
Retention policies
Retention policies have been implemented to group settings for retaining folders and email messages and to apply these to mailboxes.
Outlook Web App mailbox policy
Outlook Web App mailbox policies are implemented for managing access to functions in Outlook Web App.
Mobile device mailbox policy
Mailbox policies for mobile email queries contain settings that come into effect when data is accessed with mobile devices through the synchronization protocol Exchange ActiveSync. The settings include, for example, password requirements, specifications for email attachments, device encryption data and access rules for shares.
Role assignment policy
Policies for role assignments have been implemented to provide users with functions and tasks for managing their mailboxes.
To display information about a policy
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In the Manager, select the Microsoft Entra ID > tenants > <Microsoft Entra ID tenant> > Exchange Online administration > policies> <policy type>.
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Select the policy in the result list.
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Select one of the following tasks:
Exchange Online mailboxes can send, receive, and save messages. Exchange Online recognizes several mailbox types. The mailbox types listed below are supported in One Identity Manager. Exchange Online mailboxes are loaded into One Identity Manager by synchronization.
Table 12: Supported mailbox types
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User mailbox |
User mailboxes are assigned to Microsoft Entra ID user accounts in an Exchange Online organization.
You cannot create user mailboxes in One Identity Manager. User mailboxes are created by assigning the respective subscriptions to Microsoft Entra ID user accounts. By these means, user mailboxes are created that do not appear in One Identity Manager until after synchronization. The user mailboxes can be subsequently provisioned automatically in Exchange Online. |
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Equipment mailbox |
Equipment mailboxes are resource mailboxes used for planning resources, such as computers or laptops.
You can create equipment mailboxes in One Identity Manager. When you create an equipment mailbox, a Microsoft Entra ID user account is also created and linked to the mailbox. |
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Room mailbox |
Room mailboxes are resource mailboxes used for planning meeting locations.
You can room equipment mailboxes in One Identity Manager. When you create a room mailbox, a Microsoft Entra ID user account is also created and linked to the mailbox. |
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Shared mailbox |
Shared mailboxes are mailboxes that are used by several users.
You can create shared mailboxes in One Identity Manager. When you create a shared mailbox, a Microsoft Entra ID user account is also created and linked to the mailbox. |
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Discovery mailbox |
In Exchange Online, a discovery mailbox that is used as target mailbox for searches using eDiscovery, is created by default. You cannot edit discovery mailboxes in One Identity Manager. |
Detailed information about this topic
Exchange Online mailboxes are loaded into One Identity Manager by synchronization.
You cannot create user mailboxes in One Identity Manager. User mailboxes are created by assigning the respective subscriptions to Microsoft Entra ID user accounts. By these means, user mailboxes are created that do not appear in One Identity Manager until after synchronization. The user mailboxes can be subsequently provisioned automatically in Exchange Online.
You can create equipment mailboxes, room mailboxes, and shared mailboxes in One Identity Manager. When you create an equipment mailbox, a room mailbox, or a shared mailbox a Microsoft Entra ID user account is also created and linked to the mailbox.
To create a mailbox
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In the Manager, select the Microsoft Entra ID > Mailboxes category.
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Click 
in the result list.
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On the main data form, enter the main data of the mailbox.
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Save the changes.
