MS Exchange mail account no longer connects after installing El Capitan

the thing is that I don't think the problem is in apple Mail client " of corse its El Capitan that is creating the problem but "I think the mail app is working just fine, it's probably the mail servers that's needs to be updated for the mail client to work as Apple designed it to. il post as soon a I tried a few solutions,

Glad you got it worked out.

The mail server problem i solved as well, we turned of ssl in the protocol settings for ip port 587.

El capitan is really flying, when al the problems i solved and you start focusing on the OS X, but to be true i still have to get the index start working.

I managed to successfully add the account:

After you try to add the account, it shows another screen where it asks for Internal URL and external URL. What I did is I used the recommended link with our internal exchange address:

https://your.exchange.com/EWS/Exchange.asmx

Both for internal and external URLs.

The account was created right away and the incoming and outgoing were setup correctly using my exchange domain.

Everyone else seems to be having problems with mail, but my problem is with Calendar and o365. The calendar just doesn't seem to want to sync or connect with outlook.office365.com server, but the mail has worked flawlessly since upgrading. I've tried deleting and readding in calendar and in system preferences, but nothing seems to have an effect. I can't believe that o365 doesn't have an up-to-date server protocol!

Have you tried to reinstall office 365 feels like it could be something wrong with the 365 installation after the upgrade to capitan

Do a office update there should be a new update that solves the problem for outlook 2011,

but it not for 2016.

Hi everyone,

i am desperately in need of help; spent full day on fixing the exchange problem but no success + full of frustration.

Upgraded to El Capitan, using exchange server with Mail. This morning i suddently started to get cannot connect to exchange server error. So I deleted the account, tried to re-add but had problem with it. re-added Certificate file to the key chain, but still cannot add/connect to exchange server.

1) can you think of other solutions?

2) if i install office 2016, can i use Mail and Outlook 2016 simultaneously (i don't want to mess-up my other accounts unless it works fine)?

3) can i downgrade from El Capitan to Yosemite without Time machine; is so can you send me a link explaining how to do it

thank you

f

Thanks man!

just upgraded too and same issue with exchange. I run two accounts and my exchange account just kept failing with invalid login. As soon as I added "webmail" to the front of the external server I was back up and running. Weird!....... but it works - so I'll take it.

Not sure if it'll work for everyone but my external server was "remote.server.name" and I changed it to "webmail.remote.server.name" and it worked

I juste upgrade to El Capitan 10.11.1, problem with my Microsoft Exchange. I suppressed it an create at new, everything is ok now.

I got it working Guys!!!!

Use the same setting just like your iPhone.

Don't follow the example that states on the example of the internal/external URL. The greyed out example uses: https://webmail.exchangeserver.com

just take out the "https://"

Here are my settings:

Email Address: Not@Telling.com

Username: Telling\Not = Domain\Username

Password: 123456

Internal URL: Leave this blank...

External URL: webmail.Telling.com = webmail.RegisteredDomainName.com Notice that I left out the "https://"

I also got it working but a different way. And I've been able to repeat it. After locking myself out of my work exchange account about 20 times... I found that if I use the OWA link that you can access your company e-mail using a web browser. But I accidentally found a trick.

FIrst I had to delete my account and any other exchange accounts.I tried and tried but it wouldn't work until I did this and then recreated my account. Before recreating account, I was prompted to REBUILD my e-mails and I did that. ( I am not sure if that is necessary but I think it helped a lot) After rebuilding, I recreated my account. Then I input the fields...

For e-mail address don't use: Firstname.Lastname@xxx.com instead use the alias if your company uses them....

FLastname@xxx.com (usine the first initial of your first name and your last name...no periods....seems to be a widely used standard)

For internal link I put : http://owa.xxx.xx.com\domain

For external link I put: owa.xxx.xx.com (no http and no domain)

and it worked for me... on 2 different machines...But make sure you aren't locked out of your exchange account. On one machine, I updated to El Capitan and left my house for hours... When I got home, I found my work account was locked out on my phone and other devices... THis was because after the upgrade, there were too many unsuccessful attempts on my account. SO if you are locked out, even if this method works, it won't work until you are reset from any lockouts.. (Both times, I just happened to be logged in using the OWA web browser connection but this should not have had a bearing on it working.)

It can work... I tried everything for over a week and finally found this method to work.

ANY HELP?