Allow Users from Trusted Domain to access Shared Mailboxes

As this is not possible to do with the Exchange 2010 GUI, here the two Exchange – Powershell commands needed

To add FullAccess rights to an trusted account:

[PS] C:>Add-MailboxPermission -Identity <> -User <trusted_domain><user> -AccessRights FullAccess -InheritanceType All

To add “Send-As” Rights, you will have to change the AD – Permissions for the account:

[PS] C:>Add-ADPermission -Identity ‘CN=Shared Mailbox Name,OU=users,DC=domain,DC=com’ -User <trusted_domain><user> -ExtendedRights ‘Send-as’

to be on the safe side, add the shared mailbox in LDAP notation

Convert “Normal” Mailbox to Linked Mailbox in Exchange 2010

A linked Mailbox is a Mailbox where the master user is in a trusted domain inside your domain forest, whereas a local mailbox belongs to a user in the local domain. If you want to convert a local mailbox to a linked mailbox, according to Microsoft, you will have to

1) disable the Mailbox
2) convert and reattach the Mailbox

unfortunately this was not working for me and gave an error message that the mailbox could not be found in the given mailbox database.

Since Exchange 2010 SP1 this has been made easier (and faster) by providing a new CLI command to reassign a mailbox on-the-fly.

$cred = get-credential

You will be asked for a Username and password, here you will need a domain admin account in the trusted domain

Set-User -Identity <oldusername> -linkeddomaincontroller <domain controller in trusted domain> -LinkedCredential $cred -linkedmasteraccount <user in trusted domain>

<oldusername> is your user in the local domain, <user in trusted domain> is the user in the trusted domain (which is the new owner of the mailbox), the other two options should be self – explanatory.

You will notice a changed icon for the mailbox in the Exchange control panel and the account in the local domain gets deactivated (as it is no longer used to authenticate a user). The account though is still neded. All users will get prompted to add a new username and password in their outlooks, where they have to enter their username and password for their home-domain.


Quick Reminder on bcdedit

For dual (or triple) – boot setups with Windows 7 you will have to change the boot entry and/or the boot order…

To do this, open a command prompt (WITH admin priviledges!) and type


To rename the entry, use

bcdedit /set {GUID} description “Your Boot Entry Name”

to change the default boot os, use

bcdedit /set {bootmgr} default “{GUID}”

The GUID will be shown by the bcdedit command next to the corresponding entry

Use International E-Mail Headers in Outlook 2013

If you use a localized version of Outlook, you will also get localized Message Headers. Especially instead of “Re: <original Subject>” Outlook will add “AW: <original subject>” to any Mail you answer directly….

This is a configurable option which can be switched off, at least for Outlook 2010 and 2013 the Option is located here:outlook_international

For older Outlook Versions, look here

iReport Template for Racktables

Racktables is a really nice tool to keep your Network cabling plan up to date and documented. But I was lacking the possibility to print out a single page which contains all the (to me) relevant information about a single switch or a single patchpanel. iReport is an reporting tool similar to crystal reports but Open Source which takes all information directly from a database and allows you to design a report with the results of your database query. It even includes a visual query designer which helps you with the easier database queries.

Continue reading iReport Template for Racktables

Use Third Party SFP Modules on Cisco Devices

Usually you will need a Cisco – SFP Module for each Cisco device, but there is an undocumented (and unsupported!) CLI command to be able to use (cheaper) third party modules. Although this is not recommended (and should never be used in a production environment) it is a cheap method to set up a lab environment with your spare Cisco devices.

Continue reading Use Third Party SFP Modules on Cisco Devices