Password protect Outlook OST file

How can I password protect my Outlook 2013 .OST file?
Is there any way to do this like I did with the .PST file?
If not, is there any reason I cannot convert my .OST to a .PST?
Password protecting my Windows user account is not enough.
Thanks, Doug
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Scott CSenior EngineerCommented:
There is no way to password protect your OST file.  

You can convert an OST to a PST, but when you run Outlook in cached mode, another one will be created with no password protection.

You can encrypt your drive with BitLocker

Your other option is to run Outlook in online mode and not have an OST file.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
A. S. BurgessLead TechnicianCommented:
Since you can't password lock your OST file, it may be easier to create a new PST file with a password and transfer the files from your OST over to the PST.

Open Outlook 2013 and click File in the Top Ribbon. Click Outlook data file (.pst) and Click OK. Name the File and Click OK to save it.  Check the box below the name to add a password.
donna adee786Commented:

After a number of searches I got the utility which is useful to fix password protected .ost files. Check it, surely it will convert .ost into .pst file format.

May it will be useful for you

Best regard
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.