We became aware of a backup malfunction in our system that created a backup job that “nested” itself and filled up the entire volume. When ExchangeDefender systems storage reaches critical levels additional activity is queued.
As this activity cascades throughout our redundant systems some users noticed sluggishness in response. During this interval no mail was lost but performance was not where it needed to be.
We have addressed the problem and the root issue that caused it but are continuing to monitor even more data points as this should not have happened in the first place.