Probleme mit autodiscover

Ausnahmedetails: Nachricht: The underlying connection was closed: An unexpected error occurred on a receive. Typ: System.Net.WebException Stapelüberwachung: at System.Net.HttpWebRequest.GetResponse() at Microsoft.M365.RCA.Services.RcaHttpRequest.GetResponse() Ausnahmedetails: Nachricht: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. Typ: System.IO.IOException Stapelüberwachung: at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count) at System.Net.Security._SslStream.StartFrameHeader(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security._SslStream.StartReading(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security._SslStream.ProcessRead(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.TlsStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.PooledStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.Connection.SyncRead(HttpWebRequest request, Boolean userRetrievedStream, Boolean probeRead) Ausnahmedetails: Nachricht: An existing connection was forcibly closed by the remote host Typ: System.Net.Sockets.SocketException Stapelüberwachung: at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)