If you are trying to get Acrobits SIP phone working on your iPhone with the 3CX VoIP telephone system use the settings indicated below.
For the domain entered the local network DNS name of the server i.e. what is used to connect to 3CX on the local network.
For Register via leave the default setting of domain
Here [...]
You can use this site to test exchange activesync connectivity
https://www.testexchangeconnectivity.com/
The site is an official Microsoft site specifically for testing Exchange installations and connectivity. The test will fail if you use a self-signed SSL certificate, in which case, you’ll need to check the “Ignore Trust for SSL” checkbox. On the [...]
To add an Exchange account to your iPhone, tap Settings, then Mail, Contacts, Calendars, then Add Account, then Microsoft Exchange. Note, you can configure only one Exchange account per device..
On the next screen, enter your complete email address, domain, username, password, and a description (which may be anything you like). Ask your Exchange server [...]
