Final Update: Exchange Migration | ExchangeDefender [ Skip to content ](#main) [ ![ExchangeDefender](/assets/images/xd_logo_blue.png) ](/) Email Security ![Platform Overview](/assets/images/m-xd-pro.png)### ExchangeDefender PRO Enterprise-grade email security made simple for every business. [Sign Up](/sign-up) [Live Demo](/demo) [Email Security Stops spam, malware & phishing in real time. ](/email-security) [Encryption Secure your emails, attachments & sensitive data. ](/corporate-email-encryption) [Web File Sharing Easy, safe cloud file sharing with access control. ](/web-file-server) [Live Archive Locked-in email backup & continuity during outages. ](/livearchive-backup) [Emergency Inbox Keep email flowing without interruption if your provider fails. ](/inbox) [Spearphish Train your team with phishing simulations & risk tracking. ](/spearphishing) Managed Email ### Enterprise-Grade Managed Email Reliable, secure, and fully managed email operations for modern organizations. ![ExchangeDefender](/assets/images/managed_email_menu.png) [Microsoft365/Google Email Management Expert management and security for Microsoft 365 and Google Workspace email. ](/managed-email-operations) [AI Advisory Secure, practical AI consulting & implementation for SMBs. ](/management-ai) Company ### ExchangeDefender: 29+ Years of Trust We are a cybersecurity company focused on business email protection, with 29+ years of experience keeping organizations secure, connected, and resilient. ![ExchangeDefender](/assets/images/careers_1.png) [ About Us Learn our purpose, values, and the mission behind every decision. ](/about-us) [ Blog News, product updates and email security insights. ](/blog) [ Capabilities Discover the tech and expertise that keep your email secure around the clock ](/capabilities) [ Careers Be part of a team using modern tech to solve real threats and ship great work. ](/careers) [Partners](/partners) [Docs](/docs) [Contact Us](/contact) Talk to a Human Open menu Menu ---- Email Security [Email Security](/email-security) [Encryption](/corporate-email-encryption) [Web File Sharing](/web-file-server) [Live Archive](/livearchive-backup) [Inbox](/inbox) [Spearphish](/spearphishing) Managed Email [Microsoft365/Google Email Management](/managed-email-operations) [AI Advisory](/management-ai) Company [About Us](/about-us) [Blog](/blog) [Capabilities](/capabilities) [Careers](/careers) [Partners](/partners) [Docs](/docs) [Contact Us](/contact) Talk to a Human June 19, 2020 · [Hosted Services](https://www-preview.exchangedefender.com/blog?category=hosted-services) Final Update: Exchange Migration ================================ ![](https://storage.services.exchangedefender.network/exchangedefender-blog/blog/2020/06/a-la-carte-4.png)To check ExchangeDefender Service Health, simply visit [www.anythingdown.com](http://www.anythingdown.com) **We wanted to offer one final update before we close the ExchangeDefender NOC covering our Exchange migration.** The past few days have been largely consumed with cleanup and misc configuration requests already covered here. By far the biggest issue has been reseeding and legacy copies of mailboxes exceeding 25GB – using nearly all internal, Microsoft/powershell, and third party tools there seems to be no predictable, foolproof, failsafe way to migrate a mailbox. The larger mailbox gets, the more difficult it seems to port (one particular user has been waiting on their mail for 2 weeks - they have a 70 GB mailbox – and it’s taken dozens of attempts of repair/recheck/export/move/seed/verify) and it has been the greatest source of frustration for us and for our clients, largely because the progress indicators are unreliable and process very prone to failure the larger the mailbox gets. This is why when we started offering 2016 years ago we set up the 50GB quota with 15GB realtime and 35GB in place archive setup so we can deliver on both service restoration and disaster recovery. We are continuing to assist our partners in the following areas: \- Outlook connectivity (if it keeps on prompting you for a password you need autodiscoverregistryhacks.zip) \- Distribution Group (External) and External Forwards UI (we discovered a bug, the control panel will be back over the weekend and in meantime we’ll create it for you manually with a ticket request) \- Cancelled services (as of yesterday 6/18 we have the ability to remove organizations from ExchangeDefender/O365, so if you client cancelled or went to another service even within O365, open a ticket and request that we delete the org. You can do so on your own as well if you’ve deleted all the mailboxes/forwards/groups.) \- IoT/SMTP (while Exchange/O365 does support SMTP connectivity, managing it through our IoT connector is far more secure and reliable) - Implementation of Shared Mailboxes. Please, please, please, please DO NOT use Public Folders anymore, for any purpose. Create a Shared Mailbox instead. At this point everyone can connect, mail delivery and legacy reseeding are in progress, all systems for Exchange, ExchangeDefender, and LiveArchive are working normally. We’re looking forward to closing this ugly chapter. We have done everything in our power, and we couldn’t be more thankful for our partners who have helped us with the cleanup of the Microsoft disaster. Thank you. We are sorry that so many clients were inconvenienced with this, we planned and managed every step of this migration by the book with thousands of other successful migrations that happened from 2016 – Aug 2019, but when your vendor pulls the rug underneath you and damages hundreds of mailboxes unannounced… many of us will soon be enjoying the first day off in June. The only good news is, you will not have to go through this process again. [ Previous post Exchange After-Migration Update June 16, 2020 ](https://www-preview.exchangedefender.com/blog/2020/06/exchange-after-migration-update) [ Next post Gmail and Microsoft 365 Migration Options June 29, 2020 ](https://www-preview.exchangedefender.com/blog/2020/06/gmail-and-microsoft-365-migration-options) Related Posts ------------- [ ![](https://storage.services.exchangedefender.network/exchangedefender-blog/blog/2026/04/xd10.png) 2 Apr ](https://www-preview.exchangedefender.com/blog/2026/04/announcing-exchangedefender-10)### [Announcing ExchangeDefender 10](https://www-preview.exchangedefender.com/blog/2026/04/announcing-exchangedefender-10) [Read more: Announcing ExchangeDefender 10](https://www-preview.exchangedefender.com/blog/2026/04/announcing-exchangedefender-10) [ ![](https://storage.services.exchangedefender.network/exchangedefender-blog/blog/2025/09/Top-7-IT-Solutions-Every-Small-Business-Needs-in-2025.jpg) 30 Sep ](https://www-preview.exchangedefender.com/blog/2025/09/top-7-it-solutions-every-small-business-needs-in-2025)### [Top 7 IT Solutions Every Small Business Needs in 2025](https://www-preview.exchangedefender.com/blog/2025/09/top-7-it-solutions-every-small-business-needs-in-2025) [Read more: Top 7 IT Solutions Every Small Business Needs in 2025](https://www-preview.exchangedefender.com/blog/2025/09/top-7-it-solutions-every-small-business-needs-in-2025) [ ![](https://storage.services.exchangedefender.network/exchangedefender-blog/blog/2025/09/Website-Active-Image-10.jpg) 23 Sep ](https://www-preview.exchangedefender.com/blog/2025/09/exchangedefender-rolls-out-advanced-reject-policies-for-safer-inboxes)### [ExchangeDefender Rolls Out Advanced 'Reject Policies' for Safer Inboxes](https://www-preview.exchangedefender.com/blog/2025/09/exchangedefender-rolls-out-advanced-reject-policies-for-safer-inboxes) [Read more: ExchangeDefender Rolls Out Advanced 'Reject Policies' for Safer Inboxes](https://www-preview.exchangedefender.com/blog/2025/09/exchangedefender-rolls-out-advanced-reject-policies-for-safer-inboxes) Search the blog Search Recent Posts ------------ - [ExchangeDefender New UI is Live](https://www-preview.exchangedefender.com/blog/2026/05/exchangedefender-new-ui-is-live) - [Announcing ExchangeDefender 10](https://www-preview.exchangedefender.com/blog/2026/04/announcing-exchangedefender-10) - [Merry Christmas](https://www-preview.exchangedefender.com/blog/2025/12/merry-christmas) - [Why IoT Devices Are a Hidden Security Risk for Your Business](https://www-preview.exchangedefender.com/blog/2025/11/why-iot-devices-are-a-hidden-security-risk-for-your-business) - [Top 5 IT Problems Small Businesses Face in 2025 — and How to Fix Them](https://www-preview.exchangedefender.com/blog/2025/10/top-5-it-problems-small-businesses-face-in-2025-and-how-to-fix-them) Categories ---------- - [Archiving](https://www-preview.exchangedefender.com/blog?category=archiving) (21) - [Business Continuity](https://www-preview.exchangedefender.com/blog?category=business-continuity) (13) - [Compliance](https://www-preview.exchangedefender.com/blog?category=compliance) (8) - [ExchangeDefender](https://www-preview.exchangedefender.com/blog?category=exchangedefender) (349) - [General](https://www-preview.exchangedefender.com/blog?category=uncategorized) (590) - [Hosted Services](https://www-preview.exchangedefender.com/blog?category=hosted-services) (86) - [Industry News](https://www-preview.exchangedefender.com/blog?category=industrynews) (29) - [Marketing](https://www-preview.exchangedefender.com/blog?category=marketing) (18) - [Phishing](https://www-preview.exchangedefender.com/blog?category=phishing) (5) - [PRO TIPS](https://www-preview.exchangedefender.com/blog?category=pro-tips) (44) - [Product Features](https://www-preview.exchangedefender.com/blog?category=product-features) (54) - [Security](https://www-preview.exchangedefender.com/blog?category=security) (65) - [Shockey Monkey](https://www-preview.exchangedefender.com/blog?category=shockey-monkey) (22) - [Spamfilter](https://www-preview.exchangedefender.com/blog?category=spamfilter) (5) - [Support](https://www-preview.exchangedefender.com/blog?category=support) (45) - 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