Mirela_Buru I only see one error (RemoteNetworkErrorTransientException), here is the info from LastFailure (I hope this can bring a light):
FailureType : TooManyTransientFailureRetriesPermanentException
FailureHash : af07
FailureCode : -2146233088
MapiLowLevelError : 0
FailureSide :
FailureSideInt : 0
ExceptionTypes : {TooManyTransientFailureRetries, MRS, MRSPermanent, Exchange...}
ExceptionTypesInt : {633, 10, 12, 1...}
WorkItem : IncrementalSync
Message : The job encountered too many transient failures (97) and is quitting. The most common failure is RemoteNetworkErrorTransientException/IOException/SocketException with the
hit count 60. --> We were unable to reach your email provider. Please check your server settings, or try again later. --> Unable to read data from the transport
connection: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected
host has failed to respond. --> A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed
because connected host has failed to respond
MessageData :
DataContext :
DataContextData :
StackTrace :
InnerException : RemoteNetworkErrorTransientException: We were unable to reach your email provider. Please check your server settings, or try again later. --> Unable to read data from the
transport connection: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because
connected host has failed to respond. --> A connection attempt failed because the connected party did not properly respond after a period of time, or established
connection failed because connected host has failed to respond
UnknownElements :
UnknownAttributes :
XmlSchemaType :