Steps to Solve Outlook 2016 Won’t Connect To Exchange?

Microsoft Outlook is one of the best email clients in the market. Most of the people use it for work purposes. Due to its interface, this has gained a lot of attention. Despite having various industry leading features and services, you might encounter some problems during its usage. One of the well-known problems is Outlook 2016 won’t connect to exchange or another version of this error is ‘The connection to Microsoft Exchange is unavailable’.

There can be many different reasons for this glitch. One is corruption in the registry files. Also. if the settings within the Outlook are not encrypted, this error can occur. Sometimes, you can even face this error if the profile gets corrupted somehow.

Moreover, when there is some glitch within the ‘Exchange’ server itself, then due to that this error can pop up. Further, security software interference can even trigger this problem also.

Different Ways to Rectify the Outlook 2016 won’t Connect to Exchange

In this section of the article, you will get various points that will give aid to solve this problem in a quick and easy way.

Utilize the Command ‘flushdns’ to Clear the DNS Cache

In the DNS cache, all the domain names of the websites are present. Now, if some domain name gets corrupt due to some internal glitch, then while visiting the Outlook website you may get this problem.

Thus, the solution to clear this problem is to delete all the domain names from the DNS cache. In order to do that, follow the steps:

  • First, tap on the combination of both the keys ‘Windows + X’ simultaneously. Within that menu, locate and choose the option ‘Run’. This will open a new dialog box that has the same name as the option you chose on the last line.
  • Now, in the ‘Run’ dialog box, go to the text box present just beside the label ‘Open:’ and type the “command prompt” and press ‘OK’. This will open a new window with a black background that has the name ‘Command Prompt’.
  • In this window, type the following command – “ipconfig /flushdns” and then, tap on the ‘Enter’ key.
  • Wait for the command to execute fully and get rid of all the contents within the DNS cache. Once the execution is complete, quit the ‘Command Prompt.
  • At last, see if this error comes back or not.

Outlook Profile Update Procedure

If you use the Outlook application without any encryption settings, then due to that there can be a possibility to encounter the error Outlook 2016 won’t connect to exchange.

Now, the feasible solution to rectify this problem is to perform a simple update. To do that, follow the steps underneath:

  • First, hit the ‘Cortana Logo’ on the taskbar to launch the search text box.
  • Within that text box, type the text “control panel” and then hit the ‘Enter’ key.
  • From the search output, choose the option ‘Control Panel’. This will open a new window that has a similar name as the option you chose on the previous line.
  • Within the ‘Control Panel’ window, there are various categories of computer settings. Out of those locate and choose a category called ‘Mail’.
  • When a new ‘Mail’ window comes up, navigate and select the option ‘Show Profiles’
  • Next, choose the profile you have and then, tap on the option ‘Properties’. After that, from the menu that pops up, choose ‘Email Accounts’ option.
  • Now, from the new window that comes up, choose the account ‘Microsoft Exchange (send from this account by default) and after that, tap on the option ‘Change’.
  • Next, hit the option ‘More Settings’. This will launch a new window ‘Microsoft Exchange’. Then, within it navigate and choose the tab ‘Security’.
  • Under this tab, go to the section ‘Encryption’ and inspect the option that says ‘Encrypt data between Microsoft Office Outlook and Microsoft Exchange’. Now, tap on the buttons ‘Apply’ and ‘OK’ respectively.
  • At last, hit the ‘Next’ and then ‘Finish’ button to apply the change.

Remove the Outlook Profile

If the previous point does not help you to get rid of this error, then the easiest solution to resolve it is to delete the Outlook profile. Follow the below guide to do it.

  • First, go to the previous point and follow the first four steps until the ‘Mail’ window comes up.
  • Within this window, locate the ‘Outlook’ profile that is present by default and deletes it.
  • Once the problem gets removed, then launch the Outlook’ application and create a new profile.

Creation of the New User Profile on Outlook Application

This point will give you an elaborate procedure to create a new profile after you have deleted the default one. A new profile can able to eliminate the error Outlook 2016 won’t connect to exchange.

In order to make a new ‘Outlook’, follow the steps present underneath.

  • First, navigate to the second point of this section and then follow up to the fourth steps in it, to open the ‘Mail’ window.
  • Within this window that comes up, go to an option ‘Show Profiles’ and tap on it. After that, hit the button ‘Add’
  • Next, enter a new name for the profile within the field ‘Profile Name’ and then, press the button ‘OK’.
  • At last, when the profile is created then, set it as a default one and see if the problem is resolved or not.

Start the Microsoft Exchange Service Once Again

The error Outlook 2016 not connecting to exchange can come up if the ‘Microsoft Exchange’ services get corrupt somehow. The solution to fix this problem is to restart this service once again. For that to happen, follow the steps below:

  • First, tap on both the ‘Windows + R’ keys simultaneously, which will open a new dialog box with the name ‘Run’.
  • Now, once this dialog box opens up, then input the following text – “services.msc” on the field next to the label ‘Open:’ and then, tap on the button ‘OK’. This will launch a new window that has the name “Services’.
  • Within this window, there will be a list of all the services which runs on the computer. From that list, choose the service ‘Microsoft Exchange’ and right-click on it.
  • After that, from the popup menu that comes up, choose the option ‘Restart’. If there is more than one service for the Microsoft Exchange, then make sure to start each of them.
  • Once all the Microsoft Exchange services are restarted, then inspect if this error resurfaced or not.

Alter the Registry of your Computer

If there is any corruption in the registry of your computer then, because of that, this issue can crop up. Therefore, the only solution for you to resolve this problem is to make some edits within the registry.

To do that, follow these steps presented below.

Perform the first five steps given below on another computer that has the same configuration as the machine which has this error.

  • Go to the previous point and then follow the first step to open the ‘Run’ dialog box.
  • Inside this dialog box, type the command “regedit” and then, hit the key ‘Enter’. This will open a window known as ‘Registry Editor’.
  • Within this window, type the following path on the address bar – “HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders”. This will show all the keys present within the folder ‘User Shell Folders’ on the right pane.
  • Now, right-click on that folder and then, choose the option ‘Export’ from the popup menu.
  • Then, choose the location of export for a key and then input a name and hit the option ‘Save’ from the ‘File’ menu.
  • Next, find the new export key and copy and paste it to the computer that has this problem.
  • Now, execute the export key on the machine with the problem and that key will automatically be added.
  • Finally, check that if you are getting this error or not

Deactivate the Security Software Temporarily

Sometimes, you can get this problem if the default security software within Windows 10 Operating System’ interferes with the ‘Outlook’ application.

To resolve this problem, the best solution is to disable the ‘Windows Defender Security Center’.

  • First, tap on the ‘Windows Logo’ on the left side the taskbar to open the ‘Start’ menu.
  • Next, from that menu, just above the ‘Power’, choose the ‘Gear’ icon. This will open a new window with the name ‘Windows Settings’.
  • On this window, go to the bottom and then, select the category ‘Update & Security’. This will open a new page within this window, where go to the left panel and select the option ‘Window Security’.
  • Now, on that same page only, navigate to the right panel with the heading ‘Windows Security’ and hit the button ‘Open Windows Defender Security Center’.
  • After that, the ‘Windows Defender’ window with the ‘Settings’ page will open up. Inside that window, go to the section ‘Virus & threat protection notifications’ and then tap on the link ‘Virus & threat protection settings’
  • This will open another page within this window with three options ‘Real-time Protection’, ‘Cloud-delivered protection’ and ‘Automatic sample submission’. Just, toggle the switch to left to turn off each of them.


You can easily solve the problem on Outlook 2016 won’t connect to exchange, if you just follow all the points on the previous section carefully. But, even after following every step on the above points still if you are unable to resolve this problem, then do not worry at all.

Just provide the details of the problem you have faced on the comment section present at the bottom of this page.

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