Archive for author: vijayragavan820

Spectre – Vulnerabilities

Recently Google Project Zero team has identified a vulnerabilities on CPU that is affecting all AMD, Intel and ARM Processors. The variants of the issue identified so far, Variant 1: bounds check bypass (CVE-2017-5753) V...

Blocking Third Party application to access Office 365

When you have your users on office 365, they tend to use integrate their account with third party cloud applications. The advantage and dis-advantage of using office 365 is that it integrates seamlessly with the third-pa...

X-Microsoft-Exchange-Diagnostics-untrusted header – (NDR) Message header is too large – (Resolved)

Note : This issue has been fixed by Microsoft.  This article is just for an information If your office 365 is setup to amend signatures to your email that are going out to external domains or attaching disclaimers to the...

ADConnect Sync Issue – Resource/Active forest topology

Recently i’ve encountered an issue with the AD connect. I thought it is worth sharing with others. Infrastructure There are 2 forest 1. Forest A and Forest B 2. Exchange is installed on Forest A 4. Forest B users m...

Case study for Office 365 migration – Part2

So, in my previous post i have discussed about the existing setup and the challenges to address the problem. Here, i’m going to discuss about the proposed architecture and how it is going to address the challenges....

Exchange certificate – Best Practice

Having worked with different exchange environment, every since the release of Exchange 2007 use of certificate has been made compulsory. It should be either self-signed or third party certificate, that should have the do...

Case study for Office 365 migration – Part 1

Recently i worked on Exchange 2010 to Office 365 migration.  It is a complex environment, i had to customize too many things to be able to make this successful.  This post is to explain the challenges that i have faced a...

IE11 issue

Recently we have upgraded all the IE 9 to IE 11.  The testing went well but didn’t realize that we found an issue after implementation. Problem: The certain group policy settings which are applied to IE9 are deprecated. ...

Resolving Time sync issues

We have had lot of issues with Time sync on members servers.  If the time is not in sync with the domain controller, you may see issues but those errors and problem may not directly point to Time issues. Problem: Once su...

AD discovery

I started focusing more on Active directory.  I thought it would help others to share my experience not just related to Exchange, but also Active directory, powershell scripts and so on. Having said that, I was tasked to...