Factory Reset a Cisco ASA5505

Here's how I did it:

Connect Putty (or equivalent) to the console and boot the unit

As it boots you will see something like the entry below. 
Press ESC when you see this:

Use BREAK or ESC to interrupt boot.

You'll be taken to the rommon #0> prompt

enter

confreg 0x41

Update Config Register (0x41) in NVRAM...

confreg

You'll see the following show up with some questions

Current Configuration Register: 0x00000041

Do you wish to change this configuration? y/n [n]: Y

enable boot to ROMMON prompt? y/n [n]: Y

select specific Flash image index? y/n [n]: Y

  enter Flash image index [1->7]: 1

disable system configuration? y/n [n]: Y

go to ROMMON prompt if netboot fails? y/n [n]: Y

enable passing NVRAM file specs in auto-boot mode? y/n [n]: Y

disable display of BREAK or ESC key prompt during auto-boot? y/n [n]: Y

You'll come up to a ROMON prompt

BOOT

once unit is booted 

ciscoasa> enable

no password, just press enter

ciscoasa# copy startup-config running-config

ciscoasa# configure terminal

Would you like to enable anonymous error reporting to help improve

the product? [Y]es, [N]o, [A]sk later: N

ciscoasa(config)# password password
ciscoasa(config)# enable password password
ciscoasa(config)# username cisco password password
ciscoasa(config)# no config-register
ciscoasa(config)# copy running-config startup-config
ciscoasa(config)# config factory-default

Factory-default configuration is completed

PowerCycle the unit and you'll be taken to the 'ciscoasa' prompt and can proceed with regular configurations.

Convert PC between Microsoft 365 tenants.

 

Here’s a process to convert a computer from one Microsoft 365 Tenant to a new tenant. 
This method worked for our users as we migrated from one 365 tenant to a new one.  
So maybe be able some of this info will help you. Your experience may differ as there are a lot of different scenarios in the IT world.  You would want to test this to make sure it does work for your environment.

The basic outline is that users will create a local administrator account on their computer.  This will allow them to disjoin the current tenant and then join the new tenant. 
Once the join is completed, this local administrator account can be removed.

Assumptions in this document

Windows 11 Users, although the 10 experiences should be basically the same.

Users are provided with the new username and password to their new tenant account, configured by IT prior to conversion as these steps were done by the user themselves.

Users are using Microsoft MFA (these steps can be bypassed or altered for your security needs)

Users have ability to create a local administrator account on their PC.

This document does not cover the migration of OneDrive data or Outlook Data. 

Conversion (in our use) did not affect data stored in the previous tenant profile on the PC. 
Users could search and move their personal data out of their old profile and into their new one.

The old profile needs to be manually removed.  

 

		1.		Right click windows logo select System -> Accounts -> Other Users
	2.		In “Other Users” select “Add Account”
3.			Some systems may skip steps 3 and 4 “How will this person sign-in”? Select “I don’t have this person sign-in information” select “NEXT”

 

4.

“Create Account” Select “Add user without a Microsoft account”

 

5.	“Create a user for this PC” enter “conversion”  assign a password that you will use later in this procedure.  This user and password will only be needed during this conversion process and will be removed once this conversion process is completed.
6.		You will be prompted to enter in password recovery responses.    These are formalities required by Microsoft for account creation.  This account will be removed by IT after the migration is completed.   Enter any generic questions and a generic response information and select “NEXT”.

 

7.

You may get prompted by a security prompt with “Do you want to allow this device to make changes” select YES

 

8.

You will see the “conversion” user is now available as a local account. Select the arrow to the right of the account name.

 

9.

Select “Change Account Type”

 

10.

Select “Change account type” Select “YES” if prompted

 

11.

Select “Administrator” press OK

 

12.

Log off/sign out of this account and computer.

 

13.	Select OTHER USER on the logon screen
14.	If you encounter an error with the user account, please reach out to IT Use the username “.\conversion” followed by the password. Please note that you require the “.\” in front of the name as pictured
15.	You will see the “set up” information followed by your desktop after a short time after you login.
16.	Open Settings –> Accounts –> Access work or school

 

17.

Locate your OldDomain.com account select “Disconnect”

 

 

18.		Select “YES”
19.		“Disconnect from Organization” Select “DISCONECT” It was our experience that BITLOCKER keys transferred.  You must verify this because if not, you could be at significant risk of accessing your PC information
20.	Use the username “.\conversion” followed by the password. Please note that you require the “.\” in front of the name as pictured

 

21.	At this point, the system is performing BitLocker decryption of your device.  Please wait, your machine will automatically reboot when completed. If prompted, select on “Restart Now”
22.	During the process you may see screen(s) similar

 

Joining user account to new domain 

23.

After the computer reboots Logon as user “conversion”

 

24.	Open Settings –> Accounts –> Access work or school

 

25.

Select “Access work or School”   Select “CONNECT”

 

 

26.

DO NOT enter your email address here. Click on “Join this device to Microsoft Entra ID”

27.

Enter your NewDomain.COM email address. USERNAME@NewDomain.COM   Select “NEXT”

 

28.	Enter your NewDomain.COM password as provided Select “SIGN IN”
		At this point, this document is following the MFA process using MS Authenticator.  Your system may vary and use a different form of MFA or none at all.  Skip these steps in favor of your environment
29.	You will now be prompted to configure your Microsoft Authenticator Select “NEXT” The assumption at the point in this document is that you have Microsoft Authenticator on your mobile device already.

 

 

30.

Select “NEXT”

 

31.

Select NEXT at this prompt.

 

32.	Open up your Microsoft Authenticator app on your mobile device.  Scan the QR code with your phone that is presented WAIT.  DO NOT  CLICK YET Continue to next step below Leave this window open.
33.	Open the MICROSOFT AUTHENTICATOR on your mobile device
34.	In the lower right corner of authenticator Select scan symbol.
35.	Scan the QR code provided with your mobile device Your NewDomain.COM account will be added to Microsoft authenticator

 

36.

Select “NEXT” on your computer.

 

37.

You will be prompted to enter the code in your mobile device

 

38.

Once you enter the matching code, you will be presented with the following. Select DONE

 

39.

Select “JOIN”

 

40.	You will be presented with a welcome screen Select “DONE”

41.  Restart your PC

LOGIN to NEWDOMAIN.COM DOMAIN

42.

When PC reboots, logon with your new domain username/password Select OTHER USER in the lower left corner.

 

43.

Enter your NewDomain.COM Email Address followed by your password and login to the system provided.

 

44.

Once logged in your account will be built, it just takes a moment

 

45.	You may be prompted to sign in with your Authenticator app.  (the number will be different to that shown in the image below).
46.	Upon entering your code, your system will be built This process will take about 5 minutes to complete.

 

47.

You will be presented with a desktop

Welcome to NewDomain.COM!