Login issues

[arsovmar]

Sometimes on logon Oneview gives this error:

Unable to reach multiple directory servers.Unable to ping multiple directory servers. Verify atleast one server availability.Verify atleast one server reachability.

Any tips on where to start investigating?

The AD directory servers are working properly no issues there and are with green in Oneview security settings, firewall ports are opened as well.

EDIT: Oneview version 2.0