Office 365 [Solved] – Migration Permanent Exception: You can’t use the domain because it’s not an accepted domain for your organization

Hello folks, In one of our Migration projects from on-premises exchange to Exchange online (Office 365), we enabled Directory Synchronization using AD Connect tool, All on-premises users was synchronized to Azure AD successfully. After enabling Hybrid Configuration wizard, we migrated a lot of mailboxes without any issues, few number of mailboxes failed to be migrated …

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Understanding the Importance of MRS Proxy in Hybrid deployment Model – Office 365

Hello office 365 Admins, In one of the projects we worked on, we had an exchange 2013 servers and we tried to set up the hybrid configuration wizard (HCW) in order to migrate mailboxes to office 365, as usual we installed AD Connect and synced users to Azure active directory. All HCW prerequisites was met …

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AD Connect objects deletion threshold – office 365

Hello Office 365 Admins, while we are working in one project to Migrate exchange 2013 to office 365 (Exchange online), we started to sync the users to azure active directory using AD Connect tool, for some reasons unfortunately we synced around 3000 users to azure active directory by Mistake, so we tried to exclude the …

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Windows Integration with RSA Security Analytics using WinRM over HTTPS – Step by Step Guide

Hello RSA Admins, As most of you know, integrating the windows event source with RSA security analytics is not that easy “straight forward”, or it’s hard to do it from the first time without any error, that’s because the integration depends on the windows configuration in the first place, and the windows vary from an …

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451 5.7.3 STARTTLS is required to send mail Error – office 365

Hello Office365 Admins, while I am working in one of my customer site to migrate mailboxes to office 365 (Exchange online), I faced an issue in the mail flow from local on premise exchange to migrated mailboxes in the cloud, when I checked the queue I noticed that the emails stuck in the queue with …

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Certificates disappear from the RSA SA GUI, but still available on the LogDecoder.

Hello RSA Admins, while I am try to upload a certificate in my Lab, I noticed that the Certificates disappear from the SA GUI suddenly, but still available on the LogDecoder. Most likely, this will happen if we uploaded a certificate to the RSA LogDecoder/Collector, that has the “subject” field empty when it was originally …

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How to reset lockbox Password in RSA Security analytics Step by Step

Hello RSA Admins, In this topic we will discuss in details how to reset RSA security analytics Lockbox password, so here we go   Connect to the Log Collector appliance via SSH as the root user. Change directory to /etc/netwitness/ng/vault/ with the following command: cd /etc/netwitness/ng/vault Make a new directory to backup the existing lockbox …

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Exchange 2013/2010 – 421 4.4.2 Connection dropped due to SocketError

Hello Exchange Experts, couple of my customers have an exchange 2013 servers reported that they faced a strange issue in their exchange servers. Some of sent emails for specific domains stuck in the queue shown an error as below: ‘400 4.4.7 Message delayed’ – Remote Server at Customerdomain.com (xxx.xxx.145.250) returned ‘441 4.4.1 Error encountered while communicating with …

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Customize Azure Multi-factor Authentication – Part 1

Hello All, In First part of Azure MFA series, we discussed the general concept of Azure MFA and how you can integrate it with your systems based on your requirements. In the second and Third part, we implemented a real MFA scenario to secure the remote desktop access to servers (RDP). In this part we …

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Exchange 2013 Hybrid Configuration wizard – subtask checkprereqs execution failed

Hello All, I worked with one of the customer to deploy Hybrid setup between exchange 2013 and office 365. The customer have two Exchange 2013 servers multi-roles, and after we synchronized local Active directory with azure AD using AD Connect we tried to enable hybrid configuration wizard. once we enabled hybrid configuration wizard we faced the …

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