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Leroy LuffFlag for South Africa

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Exchange Online vs Caching

Good day,

I have a few users mailboxes that are much larger than the "safe" size.

As i understand an OST should not be larger than 25GB. I have some users that are close to 50 and 1 or 2 that is over 50. I had to edit the registry to allow the ost to grow larger than 50.

I believe the answer is to let these users use their mailboxes online and Outlook not to cache emails. I don't have experience with this and I want to know what the challenges are if i do disable the caching of emails -  specifically search ability of old emails and connectivity external from the office.

Thanks in advance.
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If you disable caching. Reduce the mailbox size by downloading emails to local PST.

You will experiencing issues working outlook in offline mode.
Difficulties in connecting such a huge mailbox using outlook. It will be slow.
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Another option would be using an automated cloud solution.  Example: Symantec Enterprise Vault.
Users should be aware that large mailboxes, either with an ost or archiving using pst, will cause a slowdown in their computers.
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Will Szymkowski
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Thank you for the insight WIll - much appreciated.
It depends what you mean by archiving and what the user will do.  My users tend to archive and then open the archive pst in their outlook.  This practice makes their machines slow down, because they are still loading the large amount of data they were before.  When users archive they should NOT open the pst file unless absolutely necessary, and then close it when they are done.