Bug 55166 – [MS365] Powershell script may fail with Unexpected authentication failure, due to TLS

Bug 55166 - [MS365] Powershell script may fail with Unexpected authentication failure, due to TLS


Summary:	[MS365] Powershell script may fail with Unexpected authentication failure, du...

Status:	NEW

Product:	UCS
Classification:	Unclassified
Component:	Office 365
Version:	UCS 5.0
Hardware:	Other Linux

Importance:	P5 normal (vote)
Target Milestone:	---
Assigned To:	Mail maintainers
QA Contact:	Mail maintainers

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Reported:	2022-09-02 17:21 CEST by Erik Damrose
Modified:	2022-09-02 18:45 CEST (History)
CC List:	1 user (show)

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What kind of report is it?:	Development Internal
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Description Erik Damrose

2022-09-02 17:21:59 CEST

On a windows VM the powershell commands/scripts fail during auth with for example:

Connect-MsolService : Authentication Error: Unexpected authentication failure

When forcing a specific TLS version before executing the command, the command succeeds. In powershell:

[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
Connect-MsolService

This may not be an issue with different .net versions