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What is the limit for Exchange Online Powershell connections parallelly? Currently using EXO Version 3. I guess that uses REST APIs. I tried connecting multiple connections by created parallel powershell tabs and I could successfully connect to 12 parallel connections. I know RPSSession has limit to 5. Im using Connect-ExchangeOnline cmdlet to connect.
There is no (public) information on that, but yes, the RPSSession limit no longer applies. Instead, the Exchange REST API seems to use a model similar to that of the Graph, i.e. number of requests per timeframe.