Why does platform single sign on keep breaking?
Platform single sign-on intermittently breaks after a few weeks or months, forcing devices to completely drop out of directory membership. This sudden failure blocks access and requires users to either wait weeks, manually wipe the machine, or completely rejoin the system from scratch.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
- 1Exempt affected devices from conditional access policies until they reconnect.Did this help you?
- 2Leave the device off for a couple of weeks to let it rejoin.Did this help you?
- 3Wipe and rejoin the device manually.Did this help you?
- 4Moving clients entirely to softphones and headsets instead of desk phonesDid this help you?
- 5Using traditional VoIP vendors instead of software-based unified communication platformsDid this help you?
- 6Configuring device code flow exceptions for trusted locationsDid this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“My issue is that the user works without any problems, but after a few weeks or sometimes a month, PSSO suddenly breaks and prompts for re-registration.”source ↗
“they fall out of Entra about every 2-3 months and will rejoin after they have been off for a couple of weeks OR we have to wipe and rejoin everything.”source ↗
“if desk phones are a requirement, i don't know how people are down with the auth workflow and the phone just silently failing if you're not signed in.”source ↗
“we piloted it with 2 clients and the auth issues were constant, phones just stop working and nobody knows why until you sign in again”source ↗
“they need to be on top of making sure the desk phone is logged in.”source ↗
Where this came up
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