Email is part of our daily lives, and while some users prefer webmail services, others use email clients. One of the most commonly used email clients in Windows 10 is Outlook, but users have reported the “Connection to Microsoft Exchange is unavailable” error when using Outlook, so let’s see how to fix that.
Undoubtedly, Outlook is a great application for sending/receiving emails, doing simple tasks, storing reminders, integrating with Skype, allowing users to make video calls in Outlook, a “Scan” option to organize emails into specific folders. You also have the option to delete messages that are older than a certain number of days.
A Microsoft Exchange account is usually a business or school email account. Your email is provided by the Microsoft Exchange server, and all email is delivered to and stored in your mailbox on the company’s Exchange server.
What causes the “Microsoft Exchange is unavailable” error?
The message “Connecting to Microsoft Exchange is unavailable” is a relatively common error and is not version dependent. There are several reasons for this exchange error, such as:
- A network problem
- Improperly configured prospects
- Disabling RPC encryption
- Problem with DNS cache
- Outlook read-only data files
- No default gateway configuration
- Conflict with third-party software, such as
- Registry problems
- Outlook or Exchange Server is not available or working
Solutions for the “Microsoft Exchange are not available” error.
Disable all third-party computer security software
There are various third-party security programs (anti-virus, anti-virus, firewall, etc.) for the Windows operating system. While all of these programs are designed to benefit the user, sometimes they can do more harm than good. This is one such case – third-party computer security programs can interfere with Outlook and cause many different problems, including this one. In this case, you should disable (or better yet, uninstall) any third-party security software installed on your computer and see if this will eliminate the error message and allow Outlook to successfully communicate with Microsoft Exchange.
Clean up your computer’s DNS
Some sort of hiccup with your computer’s DNS may also be responsible for this problem. Fortunately, the DNS of your Windows computer can be easily removed. To clear your computer’s DNS, simply follow these steps.
- Open the “Start” menu.
- Look for “cmd.”
- Right-click on the search results for “cmd” or “Command Prompt” and click “Run as Administrator” to run the extended command prompt with administrator privileges.
- At the extended command prompt, type the following and press Enter :
- ipconfig /flushdns
- Close the order renewal prompt.
- Make sure that the problem is solved.
Change the encryption settings of your Outlook profile
According to reports, these problems can occur when you use Microsoft Outlook to log into your Microsoft Exchange account with certain encryption settings. If the encryption settings in your Outlook profile are causing this problem, you need to change them to resolve it. To change the encryption settings in your Outlook profile, you need to do the following:
- Open the Control Panel.
- In the Control Panel, locate and click the Email item.
- Click View Profiles to view all your Outlook profiles.
- Click your default Outlook profile to select it, and then click Properties.
- Click Email Accounts.
- Click a Microsoft Exchange entry (send from this default account) to highlight it, and then click Edit.
- Click More Settings.
- In the window that opens, click the Security tab.
- In the Encryption section, select Encrypt data between Microsoft Office Outlook and Microsoft Exchange.
- Click the Apply button, and then click the OK button.
- Click Next, and then click Finish for the changes to take effect.
When you’re done, check to see if there’s still a problem.
Deleting the Outlook profile
If the cause of the problem lies in the settings or configuration of your Outlook profile, the most effective solution you can use to try to get rid of the problem is to delete your Outlook profile and create a new profile from scratch. To delete your profile in Outlook, you need to do the following.
- Open the control panel.
- In the control panel, find Mail and click on it.
- Find your default Outlook profile and delete it.
After deleting your default Outlook profile, simply launch Outlook. The program will ask you to create a new profile simply follow the instructions on the screen and enter the necessary data to create a new profile. Once your new Outlook profile has been created and set as default, check to see if Outlook is having problems connecting and communicating with Microsoft Exchange.
To manually create a new Outlook profile and set it as the default profile
- Open the Control Panel.
- In the Control Panel, find the Mail item and click on it.
- Click on Add.
- Enter a name for the new profile in the Profile Name field.
- Enter any other required information and follow the on-screen instructions to create the new profile.
- After creating the new profile, set it as the default profile for Outlook, making sure that the Always use this profile option is selected, then open the drop-down menu directly below it and click on the newly created profile to select it.
Run the Microsoft Exchange System Attendant service on your Microsoft Exchange server.
A review of hundreds of cases related to this particular Microsoft Exchange account problem in Microsoft Outlook revealed the fact that the problem is not always on the client-side – in some cases, the cause of the problem may be on the server-side. The most common cause of this server-side problem is the Microsoft Exchange System Attendant service, which is not running on the Microsoft Exchange server. In this case, the Microsoft Exchange System Attendant is not running on the Microsoft Exchange server for some reason, even though it is configured to run automatically.
Just go to the properties of the Microsoft Exchange System Attendant service on your Microsoft Exchange server, make sure it is configured to start automatically in the drop-down menu next to Startup Type: click Start if the service is not running yet, or Stop then Start to restart it if it is already running and you should not have this problem anymore. The users affected by this problem who have physical access to their Microsoft Exchange server are in luck. Users who can’t install this fix on their Microsoft Exchange server themselves should simply contact the person responsible for the server and ask them to do so.
Frequently Asked Questions
A possible reason is that you are using Outlook and have disabled data encryption between the Microsoft Office Outlook profile and the Microsoft Exchange profile. The default configuration of Exchange Server 2013 requires the Outlook client to use RPC encryption. This prevents the client from connecting.
Select Account Settings -> Account Settings. On the Email tab, select your account (profile) and select Restore. Note: The restore option is not available if you are using Outlook 2016 to connect to your Exchange account. Follow the wizard instructions and restart Outlook when you're done.
Exchange Online supports mailbox access using the POP3 and IMAP4 protocols. POP and IMAP access requires SSL encryption. POP is enabled by default for all users. Users can view their POP and IMAP connection settings in Outlook online.
- In Outlook 2007, please click File -> Work offline.
- In Outlook 2010 and 2013, go to the Send/Receive tab in the Preferences group and check the Work offline button.