Unable to login to Lync server (Tieto Office 365 account)

[kurtinaitis]

Cloned from github today, compiled from branch launchpad-next (VERSION 1.23.0). Pidgin 2.10.12 (libpurple 2.10.12).
Here is some part of the debug output:

(12:17:15) sipe: generate_fedbearer_wsse: found timestamp & keydata
(12:17:15) sipe: webticket_token: received valid SOAP message from service https://login.microsoftonline.com:443/RST2.srf
(12:17:15) sipe: sipe_http_parse_uri: host 'webpoolam30e02.infra.lync.com' port 443 path 'WebTicket/WebTicketService.svc/WsFed_bearer'
(12:17:15) sipe: sipe_svc_https_response: code 500
(12:17:15) sipe: webticket_token: anonymous authentication to service https://webpoolam30e02.infra.lync.com/WebTicket/WebTicketService.svc/WsFed_bearer failed, retrying with federated authentication
(12:17:15) sipe: fedbearer_authentication: reusing cached ADFS token
(12:17:15) sipe: sipe_http_parse_uri: host 'login.microsoftonline.com' port 443 path 'RST2.srf'
(12:17:15) sipe: sipe_http_request_response_callback: cookie: x-ms-gateway-slice=008; HttpOnly
(12:17:15) sipe: sipe_http_request_response_callback: cookie: stsservicecookie=ests; HttpOnly
(12:17:15) sipe: sipe_svc_https_response: code 200
(12:17:15) sipe: generate_fedbearer_wsse: found timestamp & keydata
(12:17:15) sipe: webticket_token: received valid SOAP message from service https://login.microsoftonline.com:443/RST2.srf
(12:17:15) sipe: sipe_http_parse_uri: host 'webpoolam30e02.infra.lync.com' port 443 path 'WebTicket/WebTicketService.svc/WsFed_bearer'
(12:17:15) sipe: sipe_svc_https_response: code 500
(12:17:15) connection: Connection error on 0x55c9ec8d60d0 (reason: 2 description: Web ticket request to https://webpoolAM30E02.infra.lync.com:443/CertProv/CertProvisioningService.svc failed)

[trite2k3]

I have the same problem, havent found any solution yet.

(15:51:08) sipe: MESSAGE <<<<<<<<<< HTTP(0x270ace0)
(15:51:08) sipe: sipe_http_request_response: response was 500, throwing away security context
(15:51:08) sipe: sipe_svc_https_response: code 500
(15:51:08) connection: Connection error on 0x2639eb0 (reason: 2 description: Certificate request to https://LECOMPANYURL/CertProv/CertProvisioningService.svc/WebTicket_Proof_SHA1 failed)
(15:51:08) account: Disconnecting account...

Pidgin 2.13.0
Pidgin-sipe 1.24.0

Recently got moved to O365/cloud, it worked before when we had it On-prem.