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I bought Samsung Galaxy S2. I created new e-mail profile with my credentials and successfully connected with Exchange server. I can read my e-mail messages, but when I try to send new e-mail, I get following error:

Unable to sign or encrypt message. Certificate not installed.

My company has self issued certificate with .cer extension. What to do ?

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Have a look at android.stackexchange.com/questions/4053/… –  Flow May 4 '12 at 11:41
    
I will try solutions from given post! Thx –  Mr.M May 4 '12 at 11:44

1 Answer 1

The link below shows how to actually achieve this:

Adding .cer certificates on your Android Phone

It's been answered in this question, in another context, but I hope it helps you.

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