Configure Outlook for Hosted Mail using IMAP and CalDav Synchronizer Outlook 2016 or higher from Office 365 on Windows If you installed  Outlook 2016 ,  Outlook 2019  or  Outlook for Office 365  from Office 365 (i.e. downloaded and installed from Office 365), please be advised that those versions of Outlook have an issue with autodiscover. Because of this, you must first disable the  Simplified Account Creation wizard  in order to setup  your mailbox with our Hosted Mail. Disable Simplified Account Creation wizard You can  disable the Simplified Account Creation  wizard by following the instructions outlined at the link below: https://support.microsoft.com/en-us/topic/how-to-disable-simplified-account-creation-in-outlook-2016-outlook-2019-and-outlook-for-office-365-662bf4f8-c357-dbc8-53b3-ff8f445e8247 Alternatively, you can download and import the  disable_simplified_account_creation_wizard.reg  to your computer. Download and install the latest version of CalDav Synchronizer Navigate to CalDav Synchronizer page at https://caldavsynchronizer.org/download-2/ and download the latest version of CalDav Synchronizer (As of the writing of this guide, the latest version was 4.0.0). Extract the downloaded zip and then install CalDav synchronizer using the included setup.exe . Configure Outlook Start Outlook If this is the first time starting Outlook , the  Auto Account Setup  window will automatically launch. If this is NOT the fist time starting Outlook , click on  File  on the upper left-hand corner ( Figure 1 ). Figure 1 Click on  Account Settings , and then click  Manage Profiles   (Figure 2 ). Figure 2 In the Mail Setup window, click on  Email Accounts...  ( Figure 3 ) Figure 3 In the  Email Accounts  window, click on  New...  ( Figure 4 ). Figure 4 In the  Auto Account Setup  window, select  Manual setup or additional server types   and click  Next  ( Figure 5 ). Figure 5 On the  Choose Your Account Type  window, select POP or IMAP and click  Next  ( Figure 6 ). Figure 6 On the POP and IMAP Account Settings window, fill out the all fields ensuring you set the the Account Type drop-down to IMAP , the Incoming mail server and the Outgoing mail server (SMTP) fields to mail.hosting.deeztek.com and click the More Settings ... button ( Figure 7 ): Figure 7 On the Internet Email Settings window, click on the Outgoing Server tab, place a check mark on My ougoing server (SMTP) requires authentication and ensure Use same settings as my incoming mail server ( Figure 8 ). Figure 8 Next, click on the Advanced tab, and in the Incoming server (IMAP) field enter 993 , on the Use the following type of encrypted connection drop-down select SSL/TLS , on the Outgoing server (SMTP) field, enter 587 , on the Use the following type of encrypted connection drop-down select STARTTLS and then click the OK button ( Figure 9 ). Figure 9 Back on the POP and IMAP Account Settings window, click the Next button ( Figure 10 ). Figure 10 Outlook will test the incoming mail server and attempt to send a test email message. If everything goes well, you should see the following Test Account Settings window with checkmarks for each successful test. Click the Close button ( Figure 11 ). Figure 11 On the following window, click the Finish button ( Figure 12 ). Figure 12 Configure CalDav Synchronizer From the Outlook main window, click on CalDav Synchronize r from the top menu ( Figure 13 ). Figure 13 Next, click on Synchronization Profile s button ( Figure 14 ). Figure 14 In the CalDav Options window, click the (Add multiple profies) button and in the Select Profile Type window, select Sogo and click OK ( Figure 15 ). Figure 15 Back in the Options window under Server Settings section, place a checkbox on Use IMAP/POP3 account password ( 1 ) and then click the Get IMAP/POP3 account settings   button ( 2 ). It should automatically fill in the DAV URL , Username and Email address fields. Next, click on the Discover resources and assign to Outlook folders button ( 3 ) ( Figure 16 ). Figure 16 In the Select Resource window, in the Calendars tab, click the button to the right of the Personal Calendar ( Figure 17 ). Figure 17 In the Select Folder window, click the New... button ( Figure 18 ). Figure 18 In the Create New Folder window, under the Name field enter Calendar , under the Folder contains drop-down select Calendar Items ensure you have selected the correct e-mail account under the Select where to place the folder section and click the OK button ( Figure 19 ). Figure 19 Back in the Select Folder window, you should have a new folder named Calendar (This computer only) , select it and click the OK button ( Figure 20 ). Figure 20 Back, in the Select Resource window, click the Address Books tab and click the button to the right of the Personal Address Book ( Figure 21 ). Figure 21 In the Select Folder window, click the New... button ( Figure 22 ). Figure 22 In the Create New Folder window, under the Name field enter Contacts , under the Folder contains drop-down select Contact Items ensure you have selected the correct e-mail account under the Select where to place the folder section and click the OK button ( Figure 23 ). Figure 23 Back in the Select Folder window, you should have a new folder named Contacts (This computer only) , select it and click the OK button ( Figure 24 ). Figure 24 Back, in the Select Resource window, click the OK  button ( Figure 25 ). Figure 25 Back in the Options window, select Sogo (Personal Calendar) on the left-hand pane and ensure you place a check mark on Synchronize items immediately after change on the right-hand pane ( Figure 26 ). Figure 26 Next, select Sogo (Personal Address Book) on the left-hand pane and ensure you place a check mark on Synchronize items immediately after change on the right-hand pane and click the OK button ( Figure 27 ). Figure 27