March 2016: How to renew Let's Encrypt Free SSL certificates on Windows Server and IIS

For the current version as of March 2016.
How to renew LetsEncrypt Free SSL HTTPS certificates on Windows Server 2008 R2 or Server 2012 R2 and IIS using ACMESharp.

Note that after a few months months your Challenge will expire and you will have to re-create a new _Identifier032017 (or similar) with a new name and follow through the challenge validation instructions again and issue a certificate for the new _Identifier032017. It seems you can't "re-validate" an existing but expired identifier.

[freename]

IMPORTANT. Renewing after your site validation has expired.
Note that after 10 months your Challenge will expire and you will have to re-create a new _Identifier2017 (or similar) with a new name and follow through the challenge validation instructions again and issue a certificate for the new _Identifier2017. It seems you can't "re-validate" an existing but expired identifier.

The following script might really help too.. someone has written a very in-depth renewal automation script!

[Weibel]

Hi
Can you make a video to create certificate with multiple domain name and how can renew this?

[flowinsounds]

thanks very much. looks like letsencrypt-win is a better solution, since it lets me renew on a schedule, rather than playing with broken powershell modules. Any timeline on ACME having a renew function?

[mahaltech]

Hello thanks alot for tutorial very very nice and cool
I have very important question please answering me :
is this certificate
Will get renewed automatically
and my site will staying secure
or I have to do some process after three month or something like that answer me
it's very important to me .
I don't want to renew this certificate manually
is it gonna happened
automatically
and get my website inside iis secure
Or
I have to go my server and do this operation again to get
New certificate or renew the old one