Enterprise Operating Systems

Troubleshooting and Guides for: Microsoft Server, Linux, and VMware

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Dell Hardware/Software Guides

Dell Servers – PowerEdge, Blades, and Cloud
integrated Dell Remote Access Controller (iDrac)
OpenMange Server Administrator (OMSA)

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Scripting Guides

PowerShell, Bash, JSON, and Python Scripting Guides

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Exchange Best Practices: Mailbox Storage Quotas

crtechtipsFeb 12, 20163 min read

The trend for Exchange Server in recent years is towards larger mailboxes. Email is a heavily used application, users are demanding more storage for their email, and current versions of …

A Sender Policy Framework (SPF) Primer for Exchange Administrators

crtechtipsFeb 12, 20167 min read

Email spam continues to be a huge problem for organizations these days, and it usually falls on the Exchange administrator to do something about it. Aside from the usual anti-spam …

Unable to RDP into server

crtechtipsFeb 5, 20161 min read

If you are unable to remote desktop into a server using the computer name, but you are able to remote into the server using the IP address and you get …

How to Find Your DHCP Server

crtechtipsJan 15, 20161 min read

Windows open cmd as administrator run: ipconfig /all find /i “DHCP Server” Linux the DHCP server is usually located in the dhclient.leases file run: cat /var/lib/dhcp3/dhclient.leases or: grep dhcp-server-identifier /var/lib/dhcp3/dhclient.leases …

Microsoft Exchange Action Could Not be Performed on User

crtechtipsJan 15, 20161 min read

When deleting a mailbox from Microsoft Exchange Server, the following error is sometimes displayed, especially if the user has been an Exchange Administrator: Microsoft Exchange Error – Action Remove could …