Gather Expert Tactics to Resolve Errors in Outlook for Mac

Bob Maria
Bob Maria linkedin | Updated On - December 13, 2022 |

Read time 7 minutes

If you are tired of using the older version of Outlook, then you should be aware that outlook is providing Mac users the option to switch between the new Outlook and classic Outlook through a toggle in the application. Now Mac users will also experience a clean look and improved user interface, with an advanced Search, Event Scheduling, and Microsoft 365 Groups. And the macOS version 10.14 (Mojave) and later users from February 2022, will experience the new Outlook for Mac as the default.

Outlook for Mac from Microsoft has enhanced the outreach of Windows-based applications to the Mac OS platform. Now, the Mac OS users can also set up their emails in Outlook for Mac and achieve better email communication. The user interface of the software is adaptive as per the MacOS, and all the features have been designed to suit the needs of proper email management. However, it may have a few technical glitches, and here. We have gathered all expert tactics to resolve errors in Outlook for Mac.

The data file format of Outlook for Mac is OLM and saves all the mailbox items in it. Whenever you create an account in the application, a new OLM file is created for the account. Although you do not need to interact with the OLM file directly, if you want to take the backup of your account, you need to know the location of the data files.

You won’t find any difficulty in locating and accessing OLM files unless it gets damaged by certain malevolent incidences. The location of the OLM file on your Mac OS can be traced across the following links:
Outlook for MAC 2011

Users/Username/Documents/Microsoft User Data/Office 2011 Identities/Main Identity/Database

Outlook for MAC 2016

Users/username/Library/Group Containers/UBF8T346G9.Office/Outlook/Outlook 15 Profiles/Main Profile

Talking about corruption, it can be seen that many reasons, such as power failure, hard drive errors, worm intrusions, Exchange crash, Apple OS errors, etc., damages the entire OLM database which badly hits the email communication. From several Mac Outlook users’ experience, Error code 17199 is predominantly encountered by them which temporarily or permanently halts Outlook services.

Instant Solution

Kernel for OLM to PST Converter an automated tool to resolve errors in Outlook for Mac files and save into an Outlook PST format.

Fixing the Outlook for Mac error code 17199

Before users encounter the Error code 17199, they might have been trying to delete a ghost message from the Outbox, which remains in the same state. You must have experienced the same situation when you were deleting a large message with many attachments that you could not send. The moment you delete the message which remains undeleted and resides on Outbox as a ghost email, you might face “An unknown error has occurred in Outlook – Error code 17199”. All the email communication from the Outlook for Mac email client gets congested after the preceding incidence. In such incidences, controlling the error-like situation and preventing OLM corruption should be the primary concern.

Different solutions to fix error 17199: “An Unknown Error Has Occurred In Outlook”

Solution 1- Send Outbox Emails to Trash

If you want to delete your whole Outlook emails, then you must follow the steps below-

Step 1: Open your Outbox folder then delete all emails from it.

Step 2: Now, select on Send or Receive option.

Step 3: And, check whether the error is fixed, if it still exists then follow the next step.

Solution 2- Delete Ghost Emails from Outbox

If you are unable to delete all emails from Outlook’s Outbox manually, then perform the following steps:

  1. Navigate to Applications -> Utilities and launch the AppleScript Editor.
  2. In the AppleScript Editor, specify the following command, and then click Run.
tell application “Microsoft Outlook
delete every message of outbox
end tell
Solution 3- Ensure the Availability of Web Connectivity

It is better to inspect the network and web connectivity which is a primary condition to sustain the Outlook for Mac email communication services. Check if you are able to connect with the web services by simply login to any web email account. If all looks good, then you should check other Outlook settings.

Solution 4- Validate & Reconfigure the Outlook Credentials

Another undeniable reason behind the “An unknown error has occurred in Outlook” – Error code 17199 can be the incorrect Outlook for Mac user account credentials. If you have any doubt over the authenticity of username and password, then it is better to reconfigure the settings by taking the following steps:

  1. Launch the Outlook for Mac application.
  2. Click Tools, and then Accounts.
  3. Navigate to the left panel, and then select the current user account.
  4. Specify the accurate email address and password.
  5. Inspect the settings under Incoming server and Outgoing server.
  6. Close the application and restart Outlook to check if it works.
Solution 5- Try Renaming existing Identity/ Create the New One

Even after trying all the above solutions, and still, you are not able to repair the error then try to rename an existing identity; you can also try to create a new identity by using MS Database Utility or an inbuilt application of the MS Office.

While troubleshooting the Error code 17199 it is essential to check the integrity of OLM data files which suffers when any temporal or permanent disruption in the Send/Receive process occurs. You can always use Microsoft Database Utility to recreate Outlook ID for countering several corruption issues raised during the preventive measures. However, this inbuilt tool doesn’t guarantee the flawless restoration of OLM data files from the corruption situation. Getting to the core of OLM corruption and performing an automated recovery can only be facilitated by a third-party OLM recovery software.

Solution – Kernel for OLM to PST

Kernel for OLM to PST is an extraordinary application developed to remove all forms of OLM corruption and provides a secure backup mechanism to facilitate flawless OLM to PST migration. The software is reinforced with exclusive migration facilities that enable you to save repaired OLM emails on distinct email servers, cloud services, or web-based email apps, etc. Moreover, the software has unparalleled support to the latest MS Outlook 2019/2016, Outlook for Mac 2019/2016, and Windows 10 editions.


In conclusion, we have extensively discussed the issues causing the error code 17199 in Outlook for Mac. Additionally, we have shed some light on methods that can help you out in resolving this issue. If you have already tried reconfiguring the settings as described in this post to no avail, then it implies something serious. Just like any other data file, OLM data files are also prone to file corruption. If the file damage is severe, even the inbuilt tool such as MS database utility cannot undo the damage. In these dire circumstances, one requires the help of a reliable tool.

There are a whole lot of tools that promise the complete repair of damaged OLM files but rarely work. OLM to PST tool by Kernel, a trusted leader in the data recovery sphere, is an exceptional tool. It can very quickly deal with various forms of OLM corruption. It also provides a way to import OLM to Outlook 2019, 2016 and 2013. Additionally, the tool is equipped with migration facilities that offer a way to save repaired OLM email items on email servers and cloud services. It can be concluded that Kernel for OLM to PST is a tool that encompasses several useful features that can help the user get past error code 17199.

Kernel for OLM to PST