Season's greetings to all !

Since about 2 weeks Outlook is taking forever to start. Once launched, it actually remains for about 10 minutes on the "Identity configuration" windows, and only then do I get the regular Outlook screen. Once in place, it works OK but of course this very slow start is really annoying.

I have tried reconfiguring the identity several times, but nothing has changed. On the other hand I am getting nervous that all my data (contacts, calendar entries, mails) will be lost.

How can I get Outlook to start normally again, i.e. at a decent speed ?