Cannot start microsoft outlook exchange 2016. We're investigating the issues and will update this page when a fix is available. One such issue is “cannot start Microsoft Outlook 2016” as stated in this blog. The attempt to log on to Microsoft Exchange has failed" Command to run Dec 19, 2020 · I am using Exchange server 2016 on the server 2012. You cannot use features such as Out of Office, meeting availability, mail tips, the online archive, or any other web services feature that relies on Autodiscover. Cannot open Outlook window. The attempt to log on to Microsoft Exchange has failed" Jun 25, 2025 · Outlook 2016 requires access to the Autodiscover service for your Exchange service. This is a huge issue for those that utilize Outlook in their day-to-day lives, as you can’t have access to your emails, calendar, notes, and so on. This user has multiple shared folders of other employee’s in the company, they also have 18 GB’s of email. 0\Outlook\Profiles (Outlook 2019,2016) Now delete all the folders listed under Profiles. Sometimes, Outlook OST files get damaged, corrupted, or turn inaccessible due to. I cannot open the Outlook window. the "Outlook. g. Are you having trouble starting Outlook or receiving "Cannot start Microsoft Outlook. Jan 22, 2025 · In some scenarios, MS Outlook probably won’t work efficiently and show errors. You may want to contact your mailbox provider or system administrator about this issue. Jun 25, 2025 · Describes an issue that causes you to be prompted for your password every time that Outlook 2016 or Outlook 2013 starts. No cached mode. 1000 32-bit version. The set of Folders cannot be opened. Cannot open the Outlook window" error messages? We can fix the problem for you, or you can use the troubleshooting steps we're providing below to help resolve these startup issues. Outlook is report an… Oct 10, 2022 · My Office 2016 Outlook was working fine, but then I started to get the following message every time I try to open Outlook: “Cannot start Microsoft Outlook. Oct 8, 2024 · "Cannot start Microsoft Outlook. Outlook: 2016 16. If, for some reason, Outlook is not connecting to the Exchange Server, users face many problems in getting their message across. Apr 7, 2025 · OST files are created when you add an IMAP, Exchange, or Microsoft 365 account in Outlook. As the primary means of enterprise communication is unavailable, novice users find it hard to register complaints with IT. Mar 11, 2025 · Find answers to Cannot start Microsoft Outlook from the expert community at Experts Exchange Mar 17, 2021 · Situation: Exchange 2016 cu18 with all the available patches. 0\Outlook\Profiles (Outlook 2019,2016) Restart the computer. And again, Microsoft has provided the detailed information on how to cope with this problem, you can find it on this page. Relaunch Outlook and recreate your email profile. Exchange is online all the time. Oct 23, 2023 · The set of folders cannot be opened. The Oct 10, 2025 · If you have fallen prey to a situation where you cannot start Microsoft Outlook, this guide will surely interest you. Alternatively, to get the client back to a working state the "Exchange Back End" website, hosted on the Exchange 2016 server may be restarted. Mar 23, 2023 · The Microsoft Exchange Server computer is not available" or "Cannot start Microsoft Office Outlook. And added some users to access the share mailbox, when sign in using share mailbox "Cannot start Microsoft Outlook. Jul 9, 2020 · Start Outlook in Safe Mode - Still won’t open Create new Outlook Profile - Tried several times and still won’t open Run the resetnavpane command - did not fix the problem Disable Exchange cached mode - No difference Repair Outlook Data File - No data file to repair as Outlook never opened to create one. You must connect to Microsoft Exchange with the current profile before you can synchronize your folders with your Outlook data Cannot open the Outlook window" error messages? We can fix the problem for you, or you can use the troubleshooting steps we're providing below to help resolve these startup issues. 0. " Mar 23, 2021 · Connecting Outlook 2016 succeeds in connecting to Exchange (all green arrows, autodiscover working fine), and the profile is successfully created, but then when Outlook loads to the Inbox, that message appears. The attempt to log on to Microsoft Exchange has failed” e… Fixes some mailbox connection issues for Outlook 2013, Outlook 2010, or Outlook 2007 that has an Exchange 2010, Exchange 2013, or Exchange 2016 mailbox configured. No PST files. " directly related to corruption of either Outlook data file (OST and PST) or Outlook profile. Microsoft Exchange is not available. We're experiencing issues with Outlook clients when they are migrated from EXCH 2010 to EXCH 2016 environment. Outlook known issues in the June 2017 security updates Last updated: July 11, 2017 The issues documented in this section have been reported after installing the recent updates listed below. Over the weekend of the 1st, I installed updates for Office 2016 and the usual Windows cumulative updates. Cannot open the Outlook window. Our article will focus on solving the “Cannot start Microsoft Outlook. Apr 27, 2020 · This happens with Outlook 2016, on a Microsoft RDS Server 2019 connecting to an Exchange Server 2016 CU16/15. On Monday, multiple users reported that they couldn’t launch Outlook, receiving the following error: “Cannot start Microsoft Outlook. Nov 15, 2021 · The "Cannot Start Outlook" error, can be faced in several Outlook versions (Outlook 2007, 2010, 2013 or 2016), because the set of Personal folders cannot be opened, due to errors while opening the Outlook Data file (e. Before enabling EP, ensure that your clients are compatible. Dec 19, 2020 · Dear All Experts, I am using Exchange server 2016 on the server 2012. Provides a resolution. Please stay here and find the solutions. If the issue still persists, then check out this Feb 21, 2024 · Enabling Extended Protection (EP) on Exchange servers provides significant security benefits against attacks like NTLM Relay and Ticket Replay, but there are some known issues to be aware of: General issues: Older clients (pre-Windows 10, Outlook 2016) may not support EP, resulting in connection failures. Apr 22, 2025 · Outlook 2016 on RDS "Cannot start Microsoft Outlook. Therefore, they have to solve the problem themselves. The set of folders cannot be opened. Hi all, I'm using Windows 10 x64 with Office 2016 32-bit (o365). Mar 4, 2018 · Please check out Outlook<br> will not open error: Cannot start Microsoft Outlook. " This failed state will persist for approximately 15 minutes before the client returns to a working state. Jun 27, 2024 · Then, navigate to Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16. May 24, 2023 · Sometimes, when opening the Outlook application, you get the “Cannot start Microsoft Outlook. This is a tutorial to solve the following error: "Cannot Start Microsoft Outlook. The users receive the following message " Cannot start Microsoft Outlook, Cannot open the Outlook Window. I have created one share mailbox. Feb 11, 2025 · We have an RDS server running Windows Server 2019 with Office 2016 installed. The attempt to log on to Microsoft Exchange has failed. Cannot open the Outlook window for the latest information on this topic. On-premise Exchange. The set of folders canot be opened. 4966. OST file stores the synchronized copy of your mailbox data on the mailbox server and allows offline access to the mailbox data. Or, you can't create a profile. Some existing Exchange Jun 25, 2025 · Symptoms After your mailbox is migrated to Microsoft 365, you may experience the following issues: Outlook cannot connect to Exchange Server. Apr 7, 2025 · Outlook and Exchange are two essential components that drive modern business communication. There is already a lot of information about this kind of… Describes an issue in which Outlook for Microsoft 365 doesn't connect Exchange using MAPI over HTTP as expected. pst" file is corrupted or moved from its location), or due to navigation pane settings corruption, invalid Outlook Add-ins or because Outlook is running in Apr 17, 2025 · Then, navigate to Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16. I suggest you open Outlook in safe mode and check if it is still crashing. In the meantime, please use the workarounds suggested for each issue. … Sep 6, 2023 · The issue I cannot start Microsoft Outlook. sflc6 oko 6w5l8 5voeht wyii0i rm p3f hjrwzwm uqeths xk16