Exch5.5 – major dramas

Hi all,

My Exchange 5.5 server today completely baffled me when it began spitting the following error into the App log on Win2k server (9 times per second):

Source: ESE97
Categ: Performance
Evt ID: 0
Desc: MSExchangeIS (2580) Unexpected NT API error:0xC0000054

I rebooted it and saw that it needed to initiate extensive recovery steps from a huge number of log files, as well as finding loads of files in a spool directory but not in the delivery queue.

After the server was in a settled state (I had to start the IMC and Event Service manually), I again rebooted and got a clean boot.

I can find no info on the meaning of the above error. Can anybody shed some light?

Thanks,

Sake