von Es gibt einige gute Artikel, die sich mit dem Thema beschäftigen, so z.B. von Tony Redmond oder Robert Allan.
Was mir fehlte, war eine aktuelle Übersicht über alle relevanten Features / Punkte im Vergleich als Entscheidungshilfe. Hier also meine Tabelle, ausnahmsweise auf Englisch.
| Feature | Group Mailbox | SharedMailbox | UserMailbox |
| Assign fine-grained folder permissions | x1 | x | x |
| Assign FullAccess permission | x2 | x | x |
| Create individual folders | x3 | x | x |
| Delegated admins can manage the mailbox | x | x | x |
| External collaboration: supports external guests as members | x | – | – |
| Limited to 50 GB, no archive mailbox | x | x4 | –5 |
| Members can subscribe to receive copies of incoming messages to their own mailbox | x | – | – |
| Owners can add or remove members using Outlook (self-service management) | x | – | – |
| Requires an Exchange Online license | – | – | x |
| Supports sending messages by impersonating the mailbox via SendAs / SendOnBehalf | x | x | x |
| Supports Calendar | x6 | x | x |
| Supports Email | x7 | x | x |
| Supports Login as mailbox account | – | – | x |
| Supports Notes | – | x | x |
| Supports Tasks | – | x | x |
| Use inbox rules and auto-reply messages | x8 | x | x |
Fußnoten:
- „Owners“ always have full access to all content, „Members“ can be limited to read-only access (applies to calendars only) ↩︎
- Implemented through assigned „Owners“ and „Members“ – by default, both have full access to all content ↩︎
- After enabling via „
Set-OrganizationConfig -IsGroupFoldersAndRulesEnabled $True“ ↩︎ - Can be assigned a license to increase the limits ↩︎
- Depends on the assigned license (e.g. E3 and E5 offer 100/1500 GB) ↩︎
- Only a single default calendar folder ↩︎
- Only a single default folder by default, more after „
Set-OrganizationConfig -IsGroupFoldersAndRulesEnabled $True“ ↩︎ - After enabling via „
Set-OrganizationConfig -IsGroupFoldersAndRulesEnabled $True“ ↩︎
Man kann festhalten, dass sich inzwischen eine Menge getan hat. Der Großteil der ursprünglich seitens Group Mailbox vorhandenen Einschränkungen ist Geschichte. Wer auf Folder permissions oder mehrere Kalender pro Mailbox verzichten kann, sollte Group Mailboxen in die engere Wahl ziehen.
