After updating Exchange 2013sp1 to CU14 there are wrong coding inside the body with attachments

Hello. Early, When users sent attachments from Windows Explorer and used the Send to > Mail Recipient command, the message body was filled in with  "Your message is ready to be sent with the following file or link attachments:"

Now, after update, users have unrecogcnizes simbols "Qnnayemhe cnrnbn j nrop`bje qn qkeds~yhl bknfemm{l t`iknl hkh qq{kjni:" 

What is wrong with outlook (only users with 2010 have) and Exchange 2013?

Thanks :)