Apple phones are installed in Skype for business (Lync) and are not allowed to log on if no public SSL certificate is purchased. The solution is to manually import the root certificate issued by the enterprise internal CA, if the direct transfer to the Apple phone is not installed, is an unrecognized format, using Apple's official tools and more trouble, it is recommended to use the following methods to convert the certificate format and then install.
Under Ubuntu Linux, perform the following command to convert. cer to. PEM:
OpenSSL x509-in root-ca-contoso.cer-inform der-out root-ca-contoso.pem-outform PEM
Put the. Pem into the IIS Web site, IIS adds the MIME type,.pem->application/x-pem-file, and on the iphone, open the. Pem URL with Safari to install.
This article is from "Johnson's blog" blog, please be sure to keep this source http://yangqs.blog.51cto.com/127876/1898585
Apple iphone Install enterprise root certificate (Lync Login)