microsoftgraph / microsoftgraph/msgraph-metadata
Groups: `writebackConfiguration.onPremisesGroupType` cannot be unset once set
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Description
When configuring group writeback, after PATCHing a group with the following settings:
"writebackConfiguration": {
"isEnabled": true,
"onPremisesGroupType": "UniversalSecurityGroup"
}
It's no longer possible to set the onPremisesGroupType field to null, despite the documentation for this field stating that it is nullable:

Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the PATCH request against the group writeback endpoint and review the linked groupWritebackConfiguration documentation. Determine whether the nullable-field behavior is represented in this metadata repository or belongs to the Microsoft Graph service; done means the ownership and an actionable correction path are established.
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Assessment
- Domain
- api
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 18/100