Question - How can a Tenant assign its Security Deposit without Landlord Consent ? 

If this is a securities offering (with passive investors contributing funds), then the "issuer" of the securities has an obligation to inform prospective investors of all material facts necessary to make informed consent prior to making their investment decision.

Of course our landlord (and friend) knows what we're doing, and gave us consent. 

(This requirement may be waived under certain special circumstances constituting good cause for a waiver, such as the loan being issued because of a bona fide emergency, with the lender obtaining written consent from the buyer to proceed with the loan without the disclosure notice.)The closing on a home equity loan must occur at a permanent office of the lender, at a title company, or at the offices of a lawyer.After the closing occurs, the borrower has a three day period during which the borrower may cancel the loan without having to pay any charge or penalty.

Beware of using SMS marketing without prior consent.

Nothing herein shall be construed to imply that Owner/Agent will consent to any future change in residents.4.

For purposes of this Section 19 only, “Interest in the Property” means any legal or beneficial interest in the Property, including, but not limited to, those beneficial interests transferred in a bond for deed, contract for deed, installment sales contract, or escrow agreement, the intent of which is the transfer of title by Borrower to a purchaser at a future date.If all or any part of the Property or any Interest in the Property is sold or transferred (or if Borrower is not a natural person and a beneficial interest in Borrower is sold or transferred) without Lender’s prior written consent, Lender may require immediate payment in full of all sums secured by this Security Instrument.

Both record owner and equitable owner need to consent to the new security interest. 

It was at this point that I realized something had gone wrong.Yesterday, the Manager called me and it became clear that they had leased the property to the tenant without my written consent.

Mike, the CEO of the NREIG personally got involved with tenant and "negotiated" a settlement with the tenant on terms which included free rent, as well as a payment to be made by the landlord which we did not consent to.