Select the appropriate connection type:
Plain (not recommended) - the connection is not encrypted at all.
Start TLS (Transport Layer Security) - first attempt to establish connection is done by usual (non-encrypted) communication. After connection establishing, encrypted communication is used.
SSL (Secure Socket Layer) - the connection is fully encrypted. By default, the SSL port of 993 is used.

Select authentication type you want to use:
Cram MD5 - server sends a string, credentials to be encrypted with by a client. Encrypted credentials are sent to the server. It encrypts saved credentials with the same string and compares results.
Plain - no encryption (or base64) is used.

The default port number for IMAP service is 143.

Settings set here are sent as provisions and users are not able to change them.

Settings set here are sent as provisions and users can change them.

This button is used for lower (domain, user) levels.
On this (global) level you can use it to set default values.

Up to this number of emails, these items are parsed and synchronized. When number of emails exceeds this number, synchronization is based on Outlook information about items that need to be synchronized (i. e. have been changed). If there are many messages, Outlook Sync does not loop over all messages but deals with a change report provided by Outlook. Because Outlook sometimes does not inform about the changes, 100% functionality is guaranteed only if we loop over all emails.
It is not recommended to set this value too much higher than 1024 because the processing is then very CPU consuming.

Up to this email size (in megabytes), whole emails are downloaded. When email size exceeds this number, only email headers are downloaded. Whole emails are downloaded in the moment they are clicked (to open them).
This field is enabled only when the Custom option (see lower) is selected.

Select one of the following:

1. Custom: this option lets you to specify the Threshold for full download feature.
2. Headers: only email headers will be fully downloaded.
3. Full: all emails will be fully downloaded.

This feature is related to file type folders only.
If the box is checked, files are downloaded fully regardless of the download threshold set above.

Check the box and select time in minutes. Folder structure (added or deleted folders) will be synchronized in this interval.

Check the box and select time in minutes. Priority folders will be synchronized in this interval. By default, it is one minute.

Check the box and select time in minutes. Standard folders will be synchronized in this interval.

Check the left hand box if you want to enforce/ set as default this feature. Selected folders are synchronized immediately after performing (and saving) any change - e.g.: after creating a new contact, event, etc.
Right hand box:
checked - selected folders are synchronized
unchecked - you set provisions that enforce (set as default, respectively) impossibility to synchronize selected folders immediately.

Check the left hand box if you want to enforce/ set as default this feature. GAL is synchronized within standard folders interval. (Minimal interval is 60 minutes.)
Right hand box:
checked - GAL is synchronized automatically unchecked - you set provisions that enforce (set as default, respectively) impossibility to synchronize GAL automatically.

See the table for the Synchronization tab.

Select from the list how you want to have Address Book names shown:

• Numbered structure: reflects server folder structure
• Folder name only: contact folders are shown in alphabetical order
• Full folder path: folder names include parent folder (s) names (if applicable)
  
• Outlook native: Address Book names structure is fully controlled by Outlook

Check the left hand box if you want to check for updates automatically.

Check the  box if you want to see the extension list of logs (Debug) or want to see errors only (Errors only).

Check the box if you want to delete old log files by specifying a threshold in days.