Hello all,with the help of Thomas Führer i could fix the problem. It seems that with SOGoMaximumSyncWindowSize = 0 (SOGo default) phones and Outlook cannot cope with the many (512 max) changes sent by SOGo at a time. Setting it to 1 makes sync slower, but it now works, in case of Outlook very slow.
Many thanks to Thomas for his help. best regards, Hubert -- users@sogo.nu https://inverse.ca/sogo/lists
