I had this problem too. I posted my reply on a different thread, but
thought it may be applicable here as well. I do not know all the
inner workings of Mac Office nor Windows Server networks, so I may
have not related all of the information to the exact technical
specifications, but I think it is pretty close. Here is what happened
for me:
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Another suggestion (if you are on a cor****ate network):
My Mac Office 2008 apps were all so slow, it was impossible to get
work done. Excel was the worst, where it took several seconds per
cell entry with 2-4 pinwheel pauses just to enter a number. An
Entourage message would lag with pinwheel interruptions a dozen times
per paragraph. After fighting it for weeks, I happened to stumble
upon the problem while troubleshooting an unrelated Mac OS issue.
Our old System Administrator did not do the proper housecleaning on
our DNS server, so my assigned IP address for my Mac was also in the
DNS server lookup database of an old computer that was no longer on
the network. So every time any Office app went to reconcile its file
location, the app stalled trying to find the right computer for the IP
address (obviously since the network had two computers assigned to the
same IP address and one was no longer on the network). The latency of
trying to resolve the IP address conflict made the software latent as
well.
I am not an IT guy, but pretty computer literate. I am assuming that
since Entourage uses projects that share files from within the
Entourage GUI, and that these projects can be shared to network
drives, that every Mac Office app needs to know where the files need
to be saved to in case it may be a shared project file on a network
drive. I believe this is why they used "Identities" in Entourage, and
also why you must exit all Mac Office apps in order to switch
identities in Entourage.
Incidentally, here is how we figured it out: I had Mac Console open
watching the log for the unrelated problem. I fixed that problem, but
had left Console open just to be sure that the error did not return.
I thought that this error may have been the cause of the Excel
latency, so I opened Excel to test by entering data into four cells,
but realized that Excel latency problem was still occurring. When I
went to close Console, I noticed four new error log entries logged to
Excel with basically: "computername.domainname.com Microsoft Excel
[271] doClip: empty path". The domain name was recognized as our
cor****ate domain and the computer name was recognized as an old laptop
that was out of service. Our SysAdmin then checked the cor****ate
network DNS server and discovered that the old laptop and my Mac had
the same IP address. They deleted the old references so that my IP
address was clean, and now all of my latency in all of my Mac Office
apps are gone and they now perform like lightening (at least compared
to before).
Just a thought for anyone else out there. Since Mac Office apps are
so tightly integrated to each other, to Entourage, and to Identities,
network address conflicts could be the cause of your slow
performance.
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I hope this may help someone else out there! It was such a relief to
have my Mac Office working again!


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