While not blaming KAZ for the network problems, the Defence spokesperson said a number of "short-term" remediation initiatives have begun, including the formation of teams to work with "providers and subject-matter experts" to identify the cause of high call volumes to the service desk.

The department has been forced to expand its service desk capabilities to meet the demands of users as a result of the high volume of service calls.

"Performance has already improved and Defence expects to return to 'business as usual' for service standards by September," the spokesperson said, adding that KAZ has been cooperative in addressing the "extreme" demands of this period delivering the level of expertise expected under the contract.

Kaz was asked to comment on this story, but declined.