CUCM collector manager (CM) is unable to get AXL query output from CUCM.
In FINEST level CM logging below response from CUCM is observed:
HTTP Status 599 – Incorrect axl version. Supported axl versions are 11.x, 12.x and 14.x.
All supported releases of M&R
Incorrect AXL schema version configured.
It is suggested to engage CUCM team to get the correct AXL version to be used.
Edit respective Call Manager to correct the AXL schema version from Administration --> / Discovery / Discovery Center / Manage Discovery --> Call Manager Information