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mediumAzureCosmos DBerrorlearn_purview · Sep 12, 2026

Azure Cosmos DB for MongoDB: Error 261 (TooManyLogicalSessions) During Initial List Collections Call - Microsoft Q&A

Encountering error 261 ('TooManyLogicalSessions') when listing collections in Azure Cosmos DB for MongoDB (vCore) using .NET Core SDK, impacting initial database access.

“Problem description I am encountering error 261, labeled as 'TooManyLogicalSessions', when attempting to connect to my Azure Cosmos DB for MongoDB (vCore) resource. This issue occurs during the first call to 'list collections' from a .NET Core application using SDK version 10.x.x. I expected to access the database fo…”
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endpoint_security
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cloud
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Azure Cosmos DB for MongoDB: Error 261 (TooManyLogicalSessions) During Initial List Collections Call - Microsoft Q&A | 365Forge