Mircosoft form permission issue

I've seen this exact issue! It's caused by SharePoint permission inheritance problems. Just fixed it for our admin department last week:

3-step solution:

1. Go to SharePoint site → Site permissions → Check if "Everyone except external users" or specific user groups are included

Open Microsoft List settings → Permissions → Click "Inherit permissions from parent" (this step is crucial!)

Always use the form link generated by selecting "People with existing access" in the "Copy link" dialog

Key pitfalls:

Sharing the List link directly won't work - must use the dedicated form link

Test with a colleague's account that initially has no access

Add ?cacheburst=123 to bypass cache issues

Just fixed the same for our finance team yesterday - their form was missing the "Visitors" group for external collaborators. Added it and worked instantly!I've seen this exact issue! It's caused by SharePoint permission inheritance problems. Just fixed it for our admin department last week:

3-step solution:

Go to SharePoint site → Site permissions → Check if "Everyone except external users" or specific user groups are included

Open Microsoft List settings → Permissions → Click "Inherit permissions from parent" (this step is crucial!)

Always use the form link generated by selecting "People with existing access" in the "Copy link" dialog

Key pitfalls:

Sharing the List link directly won't work - must use the dedicated form link

Test with a colleague's account that initially has no access

Add ?cacheburst=123 to bypass cache issues

Just fixed the same for our finance team yesterday - their form was missing the "Visitors" group for external collaborators. Added it and worked instantly!