We failed over to the passive copy of the database and couldn't get things to fail back without reseeding the database, which is currently in progress. However, a few smartphones, HTC Touch Pro 2 in particular, don't sync with activesync anymore. I have removed and reconfigured the activesync settings without any luck. the error is 0x80072f17 on the phone. Other phones using activesync have no issue. I don't think we have all the certificates needed on the backup server. Do i need to purchase certs for it, or would it be better to set up a windows cert server and start issuing my own? Or is ther some other possible work around. is there something i need to get installed on the smartphones that might get things working?