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zimbra calendar for outlook stopped working after upgrade

Posted: Sat Oct 06, 2018 3:57 pm
by upalakshitha
we upgraded zimbra 8.6 to 8.8.9. now outlook calendar sharing stopped working. we use external active directory method for authentication. when click on webcals link outlook opens password prompt but says user password incorrect. /opt/zimbra/log/nginx.access.log shows error 401 520 must authenticate