Please see https://trac.adium.im/ticket/16773 for complete details.
Using Adium 1.5.9 with SIPEAdiumPlugin 1.18.1 with my Office/365 account works great. Upgrading to Adium 1.5.10 with the same version of SIPEAdiumPlugin 1.18.1 causes me to be repeatedly prompted with the login dialog for Lync and produces the error message "Error: Web ticket request to https://webpoolsn20b05.infra.lync.com:443/CertProv/CertProvisioningService.svc failed"
Although nothing has changed on the SIPEAdiumPlugin side, the folks in trac ticket 16773 have suggested I contact you about this, so I am cross-posting a second bug report here to cover all my bases.
Closing as duplicate of [bugs:#249]. All further information will be posted there.
Please close Adium #16773 as duplicate of Adium #16356, which was closed, but then re-opened and reverted for Adium 1.5.10.
Related
Bugs:
#249