I would start by checking the Alert Log in the website (by default this is a link from your Home tab menu bar) to get a handle on the root problem. I might even suggest an RDP to your Primary server and then using Advanced Alert Manager to temporarily disable the alert you are receiving (or edit it to add the device name in the email) so you can have a bit of breathing room.
Couple of ideas:
- Did you have a recent change in SNMP or WMI credentials?
- Any new firewall rules?
- Can you post a screenshot of one of the alert messages or entries in the log?
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