This sections tries to collect all issues experienced while using MS Windows Messenger. If you have some more, please send us a mail.

- it uses proprietary extensions to the presence protocol

- there were experienced some problems with presence mechanisms -- sometimes, the status of the users in buddy list is not updated in real time or at all

- from v5.0 it uses some proprietary extension to instant messaging protocol which breaks the specifications and makes harder the interoperability with other SIP/SIMPLE clients

- it does not accept loose route parameter in the compact form “lr”, it must be “lr=on”. In SER, you must set the “enable_full_lr” parameter of “rr” module.

- although it adds more security risks, versions below 5.0 do not have options to remember the password