# Add or Remove O365 Group members or owners
Use this format to add or remove owners or members from an existing Office 365 Group. It's not a merge action, but always an add or a remove. The filename should contain o365groupmember and format is xls(x)/csv.
Use a ; to optionally specify multiple users in a single column.
The following columns can be used: (mattercode or url is required)
- MatterCode
- Url
- OwnerAdd
- OwnerRemove
- MemberAdd
- MemberRemove
If the member or owner already exists, the user is skipped when adding
If the member or owner is removed and not already a member of owner, the user is skipped.